131507669 has 2 divisors, whose sum is σ = 131507670. Its totient is φ = 131507668.

The previous prime is 131507659. The next prime is 131507687. The reversal of 131507669 is 966705131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123498769 + 8008900 = 11113^2 + 2830^2 .

It is a cyclic number.

It is not a de Polignac number, because 131507669 - 2²⁰ = 130459093 is a prime.

It is a super-2 number, since 2×131507669² = 34588534011627122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131507609) 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, 65753834 + 65753835.

It is an arithmetic number, because the mean of its divisors is an integer number (65753835).

Almost surely, 2^131507669 is an apocalyptic number.

It is an amenable number.

131507669 is a deficient number, since it is larger than the sum of its proper divisors (1).

131507669 is an equidigital number, since it uses as much as digits as its factorization.

131507669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 131507669 is about 11467.6793205949. The cubic root of 131507669 is about 508.5305246130.

The spelling of 131507669 in words is "one hundred thirty-one million, five hundred seven thousand, six hundred sixty-nine".