131949977 has 2 divisors, whose sum is σ = 131949978. Its totient is φ = 131949976.

The previous prime is 131949953. The next prime is 131949989. The reversal of 131949977 is 779949131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98089216 + 33860761 = 9904^2 + 5819^2 .

It is a cyclic number.

It is not a de Polignac number, because 131949977 - 2⁸ = 131949721 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131949577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65974988 + 65974989.

It is an arithmetic number, because the mean of its divisors is an integer number (65974989).

Almost surely, 2^131949977 is an apocalyptic number.

It is an amenable number.

131949977 is a deficient number, since it is larger than the sum of its proper divisors (1).

131949977 is an equidigital number, since it uses as much as digits as its factorization.

131949977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 428652, while the sum is 50.

The square root of 131949977 is about 11486.9481151436. The cubic root of 131949977 is about 509.1000108405.

The spelling of 131949977 in words is "one hundred thirty-one million, nine hundred forty-nine thousand, nine hundred seventy-seven".