131885969 has 2 divisors, whose sum is σ = 131885970. Its totient is φ = 131885968.

The previous prime is 131885951. The next prime is 131885977. The reversal of 131885969 is 969588131.

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., 68890000 + 62995969 = 8300^2 + 7937^2 .

It is a cyclic number.

It is not a de Polignac number, because 131885969 - 2²⁰ = 130837393 is a prime.

It is a super-2 number, since 2×131885969² = 34787817638137922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131885989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65942984 + 65942985.

It is an arithmetic number, because the mean of its divisors is an integer number (65942985).

Almost surely, 2^131885969 is an apocalyptic number.

It is an amenable number.

131885969 is a deficient number, since it is larger than the sum of its proper divisors (1).

131885969 is an equidigital number, since it uses as much as digits as its factorization.

131885969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 50.

The square root of 131885969 is about 11484.1616585626. The cubic root of 131885969 is about 509.0176772552.

The spelling of 131885969 in words is "one hundred thirty-one million, eight hundred eighty-five thousand, nine hundred sixty-nine".