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12709193 = 71815599
BaseRepresentation
bin110000011110…
…110101001001
3212220200201212
4300132311021
511223143233
61132222505
7213012020
oct60366511
925820655
1012709193
1171a0672
12430aa35
13282ca43
14198b8b7
1511b0a48
hexc1ed49

12709193 has 4 divisors (see below), whose sum is σ = 14524800. Its totient is φ = 10893588.

The previous prime is 12709141. The next prime is 12709199. The reversal of 12709193 is 39190721.

It is a happy number.

12709193 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: 39190721 = 340711503.

It is a cyclic number.

It is not a de Polignac number, because 12709193 - 28 = 12708937 is a prime.

It is a super-2 number, since 2×127091932 = 323047173422498, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12709199) 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, 907793 + ... + 907806.

It is an arithmetic number, because the mean of its divisors is an integer number (3631200).

Almost surely, 212709193 is an apocalyptic number.

It is an amenable number.

12709193 is a deficient number, since it is larger than the sum of its proper divisors (1815607).

12709193 is an equidigital number, since it uses as much as digits as its factorization.

12709193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1815606.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 12709193 is about 3564.9955119186. The cubic root of 12709193 is about 233.3669364303.

Adding to 12709193 its sum of digits (32), we get a square (12709225 = 35652).

The spelling of 12709193 in words is "twelve million, seven hundred nine thousand, one hundred ninety-three".

Divisors: 1 7 1815599 12709193