131302109 has 2 divisors, whose sum is σ = 131302110. Its totient is φ = 131302108.

The previous prime is 131302097. The next prime is 131302117. The reversal of 131302109 is 901203131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129732100 + 1570009 = 11390^2 + 1253^2 .

It is a cyclic number.

It is not a de Polignac number, because 131302109 - 2⁸ = 131301853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131302139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65651054 + 65651055.

It is an arithmetic number, because the mean of its divisors is an integer number (65651055).

Almost surely, 2^131302109 is an apocalyptic number.

It is an amenable number.

131302109 is a deficient number, since it is larger than the sum of its proper divisors (1).

131302109 is an equidigital number, since it uses as much as digits as its factorization.

131302109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 131302109 is about 11458.7132349143. The cubic root of 131302109 is about 508.2654246171.

The spelling of 131302109 in words is "one hundred thirty-one million, three hundred two thousand, one hundred nine".