131978456 has 16 divisors (see below), whose sum is σ = 250241400. Its totient is φ = 65247424.

The previous prime is 131978443. The next prime is 131978459. The reversal of 131978456 is 654879131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131978459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91970 + ... + 93393.

Almost surely, 2^131978456 is an apocalyptic number.

It is an amenable number.

131978456 is a deficient number, since it is larger than the sum of its proper divisors (118262944).

131978456 is a wasteful number, since it uses less digits than its factorization.

131978456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185458 (or 185454 counting only the distinct ones).

The product of its digits is 181440, while the sum is 44.

The square root of 131978456 is about 11488.1876725618. The cubic root of 131978456 is about 509.1366348616.

The spelling of 131978456 in words is "one hundred thirty-one million, nine hundred seventy-eight thousand, four hundred fifty-six".