131808901 has 4 divisors (see below), whose sum is σ = 150638752. Its totient is φ = 112979052.

The previous prime is 131808881. The next prime is 131808923. The reversal of 131808901 is 109808131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131808901 - 2²³ = 123420293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131808961) 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 in 3 ways as a sum of consecutive naturals, for example, 9414915 + ... + 9414928.

It is an arithmetic number, because the mean of its divisors is an integer number (37659688).

Almost surely, 2^131808901 is an apocalyptic number.

It is an amenable number.

131808901 is a deficient number, since it is larger than the sum of its proper divisors (18829851).

131808901 is an equidigital number, since it uses as much as digits as its factorization.

131808901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18829850.

The product of its (nonzero) digits is 1728, while the sum is 31.

The square root of 131808901 is about 11480.8057644052. The cubic root of 131808901 is about 508.9185092180.

The spelling of 131808901 in words is "one hundred thirty-one million, eight hundred eight thousand, nine hundred one".