131339969 has 2 divisors, whose sum is σ = 131339970. Its totient is φ = 131339968.

The previous prime is 131339953. The next prime is 131339981. The reversal of 131339969 is 969933131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72250000 + 59089969 = 8500^2 + 7687^2 .

It is a cyclic number.

It is not a de Polignac number, because 131339969 - 2⁴ = 131339953 is a prime.

It is a super-2 number, since 2×131339969² = 34500374913841922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (131332969) 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, 65669984 + 65669985.

It is an arithmetic number, because the mean of its divisors is an integer number (65669985).

Almost surely, 2^131339969 is an apocalyptic number.

It is an amenable number.

131339969 is a deficient number, since it is larger than the sum of its proper divisors (1).

131339969 is an equidigital number, since it uses as much as digits as its factorization.

131339969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 118098, while the sum is 44.

The square root of 131339969 is about 11460.3651337992. The cubic root of 131339969 is about 508.3142714582.

The spelling of 131339969 in words is "one hundred thirty-one million, three hundred thirty-nine thousand, nine hundred sixty-nine".