131804969 has 2 divisors, whose sum is σ = 131804970. Its totient is φ = 131804968.

The previous prime is 131804951. The next prime is 131804977. The reversal of 131804969 is 969408131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130804969 + 1000000 = 11437^2 + 1000^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131804969 is a prime.

It is a super-2 number, since 2×131804969² = 34745099706181922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131804999) 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, 65902484 + 65902485.

It is an arithmetic number, because the mean of its divisors is an integer number (65902485).

Almost surely, 2^131804969 is an apocalyptic number.

It is an amenable number.

131804969 is a deficient number, since it is larger than the sum of its proper divisors (1).

131804969 is an equidigital number, since it uses as much as digits as its factorization.

131804969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 131804969 is about 11480.6345207920. The cubic root of 131804969 is about 508.9134486405.

The spelling of 131804969 in words is "one hundred thirty-one million, eight hundred four thousand, nine hundred sixty-nine".