131808923 has 2 divisors, whose sum is σ = 131808924. Its totient is φ = 131808922.

The previous prime is 131808881. The next prime is 131808961. The reversal of 131808923 is 329808131.

It is a strong prime.

It is an emirp because it is prime and its reverse (329808131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131808923 is a prime.

It is not a weakly prime, because it can be changed into another prime (131808223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65904461 + 65904462.

It is an arithmetic number, because the mean of its divisors is an integer number (65904462).

Almost surely, 2^131808923 is an apocalyptic number.

131808923 is a deficient number, since it is larger than the sum of its proper divisors (1).

131808923 is an equidigital number, since it uses as much as digits as its factorization.

131808923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 131808923 is about 11480.8067225261. The cubic root of 131808923 is about 508.9185375322.

The spelling of 131808923 in words is "one hundred thirty-one million, eight hundred eight thousand, nine hundred twenty-three".