131434309 has 2 divisors, whose sum is σ = 131434310. Its totient is φ = 131434308.

The previous prime is 131434301. The next prime is 131434313. The reversal of 131434309 is 903434131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101949409 + 29484900 = 10097^2 + 5430^2 .

It is a cyclic number.

It is not a de Polignac number, because 131434309 - 2³ = 131434301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131434301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65717154 + 65717155.

It is an arithmetic number, because the mean of its divisors is an integer number (65717155).

Almost surely, 2^131434309 is an apocalyptic number.

It is an amenable number.

131434309 is a deficient number, since it is larger than the sum of its proper divisors (1).

131434309 is an equidigital number, since it uses as much as digits as its factorization.

131434309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 131434309 is about 11464.4803196656. The cubic root of 131434309 is about 508.4359477755.

The spelling of 131434309 in words is "one hundred thirty-one million, four hundred thirty-four thousand, three hundred nine".