13091656 has 8 divisors (see below), whose sum is σ = 24546870. Its totient is φ = 6545824.

The previous prime is 13091629. The next prime is 13091677. The reversal of 13091656 is 65619031.

It can be written as a sum of positive squares in only one way, i.e., 7474756 + 5616900 = 2734^2 + 2370^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 818221 + ... + 818236.

Almost surely, 2^13091656 is an apocalyptic number.

It is an amenable number.

13091656 is a deficient number, since it is larger than the sum of its proper divisors (11455214).

13091656 is a wasteful number, since it uses less digits than its factorization.

13091656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636463 (or 1636459 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 13091656 is about 3618.2393508446. The cubic root of 13091656 is about 235.6847749666.

The spelling of 13091656 in words is "thirteen million, ninety-one thousand, six hundred fifty-six".