131727977 has 4 divisors (see below), whose sum is σ = 131859540. Its totient is φ = 131596416.

The previous prime is 131727941. The next prime is 131727979. The reversal of 131727977 is 779727131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18284176 + 113443801 = 4276^2 + 10651^2 .

It is a cyclic number.

It is not a de Polignac number, because 131727977 - 2⁶ = 131727913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131727979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64268 + ... + 66285.

It is an arithmetic number, because the mean of its divisors is an integer number (32964885).

Almost surely, 2^131727977 is an apocalyptic number.

It is an amenable number.

131727977 is a deficient number, since it is larger than the sum of its proper divisors (131563).

131727977 is a wasteful number, since it uses less digits than its factorization.

131727977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131562.

The product of its digits is 129654, while the sum is 44.

The square root of 131727977 is about 11477.2809062077. The cubic root of 131727977 is about 508.8143378197.

The spelling of 131727977 in words is "one hundred thirty-one million, seven hundred twenty-seven thousand, nine hundred seventy-seven".