13131938 has 8 divisors (see below), whose sum is σ = 19717788. Its totient is φ = 6559344.

The previous prime is 13131917. The next prime is 13131959. The reversal of 13131938 is 83913131.

It is an interprime number because it is at equal distance from previous prime (13131917) and next prime (13131959).

It can be written as a sum of positive squares in 2 ways, for example, as 10738729 + 2393209 = 3277^2 + 1547^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 13131938.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281 + ... + 5132.

Almost surely, 2^13131938 is an apocalyptic number.

13131938 is a deficient number, since it is larger than the sum of its proper divisors (6585850).

13131938 is a wasteful number, since it uses less digits than its factorization.

13131938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6628.

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

The square root of 13131938 is about 3623.8015950104. The cubic root of 13131938 is about 235.9262553271.

The spelling of 13131938 in words is "thirteen million, one hundred thirty-one thousand, nine hundred thirty-eight".