131725977 has 4 divisors (see below), whose sum is σ = 175634640. Its totient is φ = 87817316.

The previous prime is 131725969. The next prime is 131725999. The reversal of 131725977 is 779527131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131725977 - 2³ = 131725969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131725927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21954327 + ... + 21954332.

It is an arithmetic number, because the mean of its divisors is an integer number (43908660).

Almost surely, 2^131725977 is an apocalyptic number.

It is an amenable number.

131725977 is a deficient number, since it is larger than the sum of its proper divisors (43908663).

131725977 is an equidigital number, since it uses as much as digits as its factorization.

131725977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43908662.

The product of its digits is 92610, while the sum is 42.

The square root of 131725977 is about 11477.1937772262. The cubic root of 131725977 is about 508.8117627307.

The spelling of 131725977 in words is "one hundred thirty-one million, seven hundred twenty-five thousand, nine hundred seventy-seven".