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11993941 = 52123021
BaseRepresentation
bin101101110000…
…001101010101
3211120100121001
4231300031111
511032301231
61105023301
7203642521
oct55601525
924510531
1011993941
116852253
124024b31
13263c30b
141842d81
1510bdb61
hexb70355

11993941 has 4 divisors (see below), whose sum is σ = 12017484. Its totient is φ = 11970400.

The previous prime is 11993911. The next prime is 11993963. The reversal of 11993941 is 14939911.

11993941 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14939911 = 72134273.

It can be written as a sum of positive squares in 2 ways, for example, as 2414916 + 9579025 = 1554^2 + 3095^2 .

It is a cyclic number.

It is not a de Polignac number, because 11993941 - 25 = 11993909 is a prime.

It is a super-2 number, since 2×119939412 = 287709241422962, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11993941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11993911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10990 + ... + 12031.

It is an arithmetic number, because the mean of its divisors is an integer number (3004371).

Almost surely, 211993941 is an apocalyptic number.

It is an amenable number.

11993941 is a deficient number, since it is larger than the sum of its proper divisors (23543).

11993941 is an equidigital number, since it uses as much as digits as its factorization.

11993941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23542.

The product of its digits is 8748, while the sum is 37.

The square root of 11993941 is about 3463.2269633970. The cubic root of 11993941 is about 228.9043096703.

The spelling of 11993941 in words is "eleven million, nine hundred ninety-three thousand, nine hundred forty-one".

Divisors: 1 521 23021 11993941