313235509 has 2 divisors, whose sum is σ = 313235510. Its totient is φ = 313235508.

The previous prime is 313235479. The next prime is 313235581. The reversal of 313235509 is 905532313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 272976484 + 40259025 = 16522^2 + 6345^2 .

It is a cyclic number.

It is not a de Polignac number, because 313235509 - 2⁹ = 313234997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313235809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156617754 + 156617755.

It is an arithmetic number, because the mean of its divisors is an integer number (156617755).

Almost surely, 2^313235509 is an apocalyptic number.

It is an amenable number.

313235509 is a deficient number, since it is larger than the sum of its proper divisors (1).

313235509 is an equidigital number, since it uses as much as digits as its factorization.

313235509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12150, while the sum is 31.

The square root of 313235509 is about 17698.4606392759. The cubic root of 313235509 is about 679.1363812977.

The spelling of 313235509 in words is "three hundred thirteen million, two hundred thirty-five thousand, five hundred nine".