131302909 has 2 divisors, whose sum is σ = 131302910. Its totient is φ = 131302908.

The previous prime is 131302903. The next prime is 131302937. The reversal of 131302909 is 909203131.

It is an a-pointer prime, because the next prime (131302937) can be obtained adding 131302909 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128187684 + 3115225 = 11322^2 + 1765^2 .

It is a cyclic number.

It is not a de Polignac number, because 131302909 - 2⁵ = 131302877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131302903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65651454 + 65651455.

It is an arithmetic number, because the mean of its divisors is an integer number (65651455).

Almost surely, 2^131302909 is an apocalyptic number.

It is an amenable number.

131302909 is a deficient number, since it is larger than the sum of its proper divisors (1).

131302909 is an equidigital number, since it uses as much as digits as its factorization.

131302909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 131302909 is about 11458.7481427947. The cubic root of 131302909 is about 508.2664568714.

The spelling of 131302909 in words is "one hundred thirty-one million, three hundred two thousand, nine hundred nine".