131355977 has 2 divisors, whose sum is σ = 131355978. Its totient is φ = 131355976.

The previous prime is 131355953. The next prime is 131355989. The reversal of 131355977 is 779553131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120472576 + 10883401 = 10976^2 + 3299^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131355977 is a prime.

It is not a weakly prime, because it can be changed into another prime (131351977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65677988 + 65677989.

It is an arithmetic number, because the mean of its divisors is an integer number (65677989).

Almost surely, 2^131355977 is an apocalyptic number.

It is an amenable number.

131355977 is a deficient number, since it is larger than the sum of its proper divisors (1).

131355977 is an equidigital number, since it uses as much as digits as its factorization.

131355977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 99225, while the sum is 41.

The square root of 131355977 is about 11461.0635195867. The cubic root of 131355977 is about 508.3349221008.

The spelling of 131355977 in words is "one hundred thirty-one million, three hundred fifty-five thousand, nine hundred seventy-seven".