131974497 has 6 divisors (see below), whose sum is σ = 190629842. Its totient is φ = 87982992.

The previous prime is 131974489. The next prime is 131974499. The reversal of 131974497 is 794479131.

131974497 is a `hidden beast` number, since 13 + 197 + 449 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 86936976 + 45037521 = 9324^2 + 6711^2 .

It is not a de Polignac number, because 131974497 - 2³ = 131974489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131974499) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7331908 + ... + 7331925.

Almost surely, 2^131974497 is an apocalyptic number.

It is an amenable number.

131974497 is a deficient number, since it is larger than the sum of its proper divisors (58655345).

131974497 is a wasteful number, since it uses less digits than its factorization.

131974497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14663839 (or 14663836 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 131974497 is about 11488.0153638477. The cubic root of 131974497 is about 509.1315438992.

The spelling of 131974497 in words is "one hundred thirty-one million, nine hundred seventy-four thousand, four hundred ninety-seven".