131559377 has 2 divisors, whose sum is σ = 131559378. Its totient is φ = 131559376.

The previous prime is 131559361. The next prime is 131559433. The reversal of 131559377 is 773955131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130325056 + 1234321 = 11416^2 + 1111^2 .

It is a cyclic number.

It is not a de Polignac number, because 131559377 - 2⁴ = 131559361 is a prime.

It is not a weakly prime, because it can be changed into another prime (131559347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65779688 + 65779689.

It is an arithmetic number, because the mean of its divisors is an integer number (65779689).

Almost surely, 2^131559377 is an apocalyptic number.

It is an amenable number.

131559377 is a deficient number, since it is larger than the sum of its proper divisors (1).

131559377 is an equidigital number, since it uses as much as digits as its factorization.

131559377 is an odious number, because the sum of its binary digits is odd.

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

The square root of 131559377 is about 11469.9336092237. The cubic root of 131559377 is about 508.5971662291.

The spelling of 131559377 in words is "one hundred thirty-one million, five hundred fifty-nine thousand, three hundred seventy-seven".