131905207 has 12 divisors (see below), whose sum is σ = 160113456. Its totient is φ = 108144960.

The previous prime is 131905183. The next prime is 131905229. The reversal of 131905207 is 702509131.

It is not a de Polignac number, because 131905207 - 2¹¹ = 131903159 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 (131905237) 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 in 11 ways as a sum of consecutive naturals, for example, 57394 + ... + 59647.

It is an arithmetic number, because the mean of its divisors is an integer number (13342788).

Almost surely, 2^131905207 is an apocalyptic number.

131905207 is a deficient number, since it is larger than the sum of its proper divisors (28208249).

131905207 is a wasteful number, since it uses less digits than its factorization.

131905207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117078 (or 117071 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 131905207 is about 11484.9992163692. Note that the first 3 decimals coincide. The cubic root of 131905207 is about 509.0424259226.

The spelling of 131905207 in words is "one hundred thirty-one million, nine hundred five thousand, two hundred seven".