131608969 has 2 divisors, whose sum is σ = 131608970. Its totient is φ = 131608968.

The previous prime is 131608943. The next prime is 131609011. The reversal of 131608969 is 969806131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130988025 + 620944 = 11445^2 + 788^2 .

It is a cyclic number.

It is not a de Polignac number, because 131608969 - 2¹⁵ = 131576201 is a prime.

It is a super-2 number, since 2×131608969² = 34641841442485922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131608909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65804484 + 65804485.

It is an arithmetic number, because the mean of its divisors is an integer number (65804485).

Almost surely, 2^131608969 is an apocalyptic number.

It is an amenable number.

131608969 is a deficient number, since it is larger than the sum of its proper divisors (1).

131608969 is an equidigital number, since it uses as much as digits as its factorization.

131608969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 131608969 is about 11472.0952314736. The cubic root of 131608969 is about 508.6610643276.

The spelling of 131608969 in words is "one hundred thirty-one million, six hundred eight thousand, nine hundred sixty-nine".