131974537577 has 2 divisors, whose sum is σ = 131974537578. Its totient is φ = 131974537576.

The previous prime is 131974537543. The next prime is 131974537589. The reversal of 131974537577 is 775735479131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131954921536 + 19616041 = 363256^2 + 4429^2 .

It is a cyclic number.

It is not a de Polignac number, because 131974537577 - 2²⁶ = 131907428713 is a prime.

It is not a weakly prime, because it can be changed into another prime (131974537537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65987268788 + 65987268789.

It is an arithmetic number, because the mean of its divisors is an integer number (65987268789).

Almost surely, 2^131974537577 is an apocalyptic number.

It is an amenable number.

131974537577 is a deficient number, since it is larger than the sum of its proper divisors (1).

131974537577 is an equidigital number, since it uses as much as digits as its factorization.

131974537577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19448100, while the sum is 59.

The spelling of 131974537577 in words is "one hundred thirty-one billion, nine hundred seventy-four million, five hundred thirty-seven thousand, five hundred seventy-seven".