330131309 has 2 divisors, whose sum is σ = 330131310. Its totient is φ = 330131308.

The previous prime is 330131299. The next prime is 330131323. The reversal of 330131309 is 903131033.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 297390025 + 32741284 = 17245^2 + 5722^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-330131309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (330131509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165065654 + 165065655.

It is an arithmetic number, because the mean of its divisors is an integer number (165065655).

Almost surely, 2^330131309 is an apocalyptic number.

It is an amenable number.

330131309 is a deficient number, since it is larger than the sum of its proper divisors (1).

330131309 is an equidigital number, since it uses as much as digits as its factorization.

330131309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 729, while the sum is 23.

The square root of 330131309 is about 18169.5159264082. The cubic root of 330131309 is about 691.1339674897.

The spelling of 330131309 in words is "three hundred thirty million, one hundred thirty-one thousand, three hundred nine".