13931138 has 16 divisors (see below), whose sum is σ = 22686720. Its totient is φ = 6377616.

The previous prime is 13931117. The next prime is 13931147. The reversal of 13931138 is 83113931.

It is a self number, because there is not a number n which added to its sum of digits gives 13931138.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1193 + ... + 5411.

It is an arithmetic number, because the mean of its divisors is an integer number (1417920).

Almost surely, 2^13931138 is an apocalyptic number.

13931138 is a deficient number, since it is larger than the sum of its proper divisors (8755582).

13931138 is a wasteful number, since it uses less digits than its factorization.

13931138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4361.

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

The square root of 13931138 is about 3732.4439714482. The cubic root of 13931138 is about 240.6184167086.

The spelling of 13931138 in words is "thirteen million, nine hundred thirty-one thousand, one hundred thirty-eight".