12691927 has 12 divisors (see below), whose sum is σ = 13441248. Its totient is φ = 11978400.

The previous prime is 12691909. The next prime is 12691933. The reversal of 12691927 is 72919621.

It is not a de Polignac number, because 12691927 - 2¹⁵ = 12659159 is a prime.

It is a super-2 number, since 2×12691927² = 322170021946658, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12691907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45027 + ... + 45307.

It is an arithmetic number, because the mean of its divisors is an integer number (1120104).

Almost surely, 2^12691927 is an apocalyptic number.

12691927 is a deficient number, since it is larger than the sum of its proper divisors (749321).

12691927 is an equidigital number, since it uses as much as digits as its factorization.

12691927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390 (or 359 counting only the distinct ones).

The product of its digits is 13608, while the sum is 37.

The square root of 12691927 is about 3562.5730869696. The cubic root of 12691927 is about 233.2612087740.

The spelling of 12691927 in words is "twelve million, six hundred ninety-one thousand, nine hundred twenty-seven".