131923647 has 20 divisors (see below), whose sum is σ = 197440056. Its totient is φ = 87784560.

The previous prime is 131923643. The next prime is 131923651. The reversal of 131923647 is 746329131.

131923647 is a `hidden beast` number, since 1 + 3 + 1 + 9 + 2 + 3 + 647 = 666.

It is an interprime number because it is at equal distance from previous prime (131923643) and next prime (131923651).

It is not a de Polignac number, because 131923647 - 2² = 131923643 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131923643) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 54793 + ... + 57149.

Almost surely, 2^131923647 is an apocalyptic number.

131923647 is a deficient number, since it is larger than the sum of its proper divisors (65516409).

131923647 is an equidigital number, since it uses as much as digits as its factorization.

131923647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3060 (or 3051 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 131923647 is about 11485.8019746120. The cubic root of 131923647 is about 509.0661457468.

The spelling of 131923647 in words is "one hundred thirty-one million, nine hundred twenty-three thousand, six hundred forty-seven".