13199972 has 12 divisors (see below), whose sum is σ = 23724540. Its totient is φ = 6421536.

The previous prime is 13199957. The next prime is 13199981. The reversal of 13199972 is 27999131.

It can be written as a sum of positive squares in 2 ways, for example, as 6522916 + 6677056 = 2554^2 + 2584^2 .

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 in 3 ways as a sum of consecutive naturals, for example, 44447 + ... + 44742.

It is an arithmetic number, because the mean of its divisors is an integer number (1977045).

Almost surely, 2^13199972 is an apocalyptic number.

It is an amenable number.

13199972 is a deficient number, since it is larger than the sum of its proper divisors (10524568).

13199972 is a wasteful number, since it uses less digits than its factorization.

13199972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89230 (or 89228 counting only the distinct ones).

The product of its digits is 30618, while the sum is 41.

The square root of 13199972 is about 3633.1765715418. The cubic root of 13199972 is about 236.3329829891.

The spelling of 13199972 in words is "thirteen million, one hundred ninety-nine thousand, nine hundred seventy-two".