13091972 has 12 divisors (see below), whose sum is σ = 24258780. Its totient is φ = 6160896.

The previous prime is 13091971. The next prime is 13091983. The reversal of 13091972 is 27919031.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9647236 + 3444736 = 3106^2 + 1856^2 .

It is not an unprimeable number, because it can be changed into a prime (13091971) 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, 96197 + ... + 96332.

It is an arithmetic number, because the mean of its divisors is an integer number (2021565).

Almost surely, 2^13091972 is an apocalyptic number.

It is an amenable number.

13091972 is a deficient number, since it is larger than the sum of its proper divisors (11166808).

13091972 is a wasteful number, since it uses less digits than its factorization.

13091972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192550 (or 192548 counting only the distinct ones).

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

The square root of 13091972 is about 3618.2830182284. The cubic root of 13091972 is about 235.6866712326.

The spelling of 13091972 in words is "thirteen million, ninety-one thousand, nine hundred seventy-two".