131336977 has 4 divisors (see below), whose sum is σ = 131360320. Its totient is φ = 131313636.

The previous prime is 131336963. The next prime is 131336993. The reversal of 131336977 is 779633131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 779633131 = 61 ⋅12780871.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131336977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131336927) 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, 2524 + ... + 16402.

It is an arithmetic number, because the mean of its divisors is an integer number (32840080).

Almost surely, 2^131336977 is an apocalyptic number.

It is an amenable number.

131336977 is a deficient number, since it is larger than the sum of its proper divisors (23343).

131336977 is an equidigital number, since it uses as much as digits as its factorization.

131336977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23342.

The product of its digits is 71442, while the sum is 40.

The square root of 131336977 is about 11460.2345962026. The cubic root of 131336977 is about 508.3104115317.

The spelling of 131336977 in words is "one hundred thirty-one million, three hundred thirty-six thousand, nine hundred seventy-seven".