131978992 has 10 divisors (see below), whose sum is σ = 255709328. Its totient is φ = 65989488.

The previous prime is 131978953. The next prime is 131979011. The reversal of 131978992 is 299879131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4124328 + ... + 4124359.

Almost surely, 2^131978992 is an apocalyptic number.

It is an amenable number.

131978992 is a deficient number, since it is larger than the sum of its proper divisors (123730336).

131978992 is an equidigital number, since it uses as much as digits as its factorization.

131978992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8248695 (or 8248689 counting only the distinct ones).

The product of its digits is 244944, while the sum is 49.

The square root of 131978992 is about 11488.2110008478. The cubic root of 131978992 is about 509.1373241076.

The spelling of 131978992 in words is "one hundred thirty-one million, nine hundred seventy-eight thousand, nine hundred ninety-two".