12911636 has 12 divisors (see below), whose sum is σ = 23924628. Its totient is φ = 6076032.

The previous prime is 12911623. The next prime is 12911651. The reversal of 12911636 is 63611921.

It can be written as a sum of positive squares in 2 ways, for example, as 11519236 + 1392400 = 3394^2 + 1180^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12911599 and 12911608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94871 + ... + 95006.

It is an arithmetic number, because the mean of its divisors is an integer number (1993719).

Almost surely, 2^12911636 is an apocalyptic number.

It is an amenable number.

12911636 is a deficient number, since it is larger than the sum of its proper divisors (11012992).

12911636 is a wasteful number, since it uses less digits than its factorization.

12911636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189898 (or 189896 counting only the distinct ones).

The product of its digits is 1944, while the sum is 29.

The square root of 12911636 is about 3593.2764992413. The cubic root of 12911636 is about 234.5995049637.

The spelling of 12911636 in words is "twelve million, nine hundred eleven thousand, six hundred thirty-six".