131043977 has 2 divisors, whose sum is σ = 131043978. Its totient is φ = 131043976.

The previous prime is 131043967. The next prime is 131043989. The reversal of 131043977 is 779340131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92467456 + 38576521 = 9616^2 + 6211^2 .

It is a cyclic number.

It is not a de Polignac number, because 131043977 - 2²² = 126849673 is a prime.

It is not a weakly prime, because it can be changed into another prime (131043907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65521988 + 65521989.

It is an arithmetic number, because the mean of its divisors is an integer number (65521989).

Almost surely, 2^131043977 is an apocalyptic number.

It is an amenable number.

131043977 is a deficient number, since it is larger than the sum of its proper divisors (1).

131043977 is an equidigital number, since it uses as much as digits as its factorization.

131043977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15876, while the sum is 35.

The square root of 131043977 is about 11447.4441252185. Note that the first 3 decimals coincide. The cubic root of 131043977 is about 507.9321330896.

The spelling of 131043977 in words is "one hundred thirty-one million, forty-three thousand, nine hundred seventy-seven".