131897904 has 20 divisors (see below), whose sum is σ = 340736376. Its totient is φ = 43965952.

The previous prime is 131897903. The next prime is 131897959. The reversal of 131897904 is 409798131.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (131897903) 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, 1373889 + ... + 1373984.

Almost surely, 2^131897904 is an apocalyptic number.

It is an amenable number.

131897904 is an abundant number, since it is smaller than the sum of its proper divisors (208838472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131897904 is a wasteful number, since it uses less digits than its factorization.

131897904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2747884 (or 2747878 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 131897904 is about 11484.6812755078. The cubic root of 131897904 is about 509.0330312835.

The spelling of 131897904 in words is "one hundred thirty-one million, eight hundred ninety-seven thousand, nine hundred four".