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940772221 = 3130347491
BaseRepresentation
bin111000000100110…
…000101101111101
32102120020011212121
4320010300231331
53411314202341
6233204002541
732212301104
oct7004605575
92376204777
10940772221
11443050104
12223090451
1311cba086c
148cd3103b
15578d24d1
hex38130b7d

940772221 has 4 divisors (see below), whose sum is σ = 971119744. Its totient is φ = 910424700.

The previous prime is 940772167. The next prime is 940772263. The reversal of 940772221 is 122277049.

It is a happy number.

940772221 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122277049 = 139879691.

It is a cyclic number.

It is not a de Polignac number, because 940772221 - 213 = 940764029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (940779221) 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, 15173715 + ... + 15173776.

It is an arithmetic number, because the mean of its divisors is an integer number (242779936).

Almost surely, 2940772221 is an apocalyptic number.

It is an amenable number.

940772221 is a deficient number, since it is larger than the sum of its proper divisors (30347523).

940772221 is a wasteful number, since it uses less digits than its factorization.

940772221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30347522.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 940772221 is about 30672.0103840619. The cubic root of 940772221 is about 979.8542824435.

The spelling of 940772221 in words is "nine hundred forty million, seven hundred seventy-two thousand, two hundred twenty-one".

Divisors: 1 31 30347491 940772221