131897668 has 24 divisors (see below), whose sum is σ = 266136192. Its totient is φ = 56025984.

The previous prime is 131897659. The next prime is 131897671. The reversal of 131897668 is 866798131.

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, 17680 + ... + 24007.

It is an arithmetic number, because the mean of its divisors is an integer number (11089008).

Almost surely, 2^131897668 is an apocalyptic number.

It is an amenable number.

131897668 is an abundant number, since it is smaller than the sum of its proper divisors (134238524).

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

131897668 is a wasteful number, since it uses less digits than its factorization.

131897668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41811 (or 41809 counting only the distinct ones).

The product of its digits is 435456, while the sum is 49.

The square root of 131897668 is about 11484.6710009473. The cubic root of 131897668 is about 509.0327276854.

The spelling of 131897668 in words is "one hundred thirty-one million, eight hundred ninety-seven thousand, six hundred sixty-eight".