313230509 has 2 divisors, whose sum is σ = 313230510. Its totient is φ = 313230508.

The previous prime is 313230503. The next prime is 313230527. The reversal of 313230509 is 905032313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 281904100 + 31326409 = 16790^2 + 5597^2 .

It is a cyclic number.

It is not a de Polignac number, because 313230509 - 2¹² = 313226413 is a prime.

It is a super-2 number, since 2×313230509² = 196226703536798162, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313230503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156615254 + 156615255.

It is an arithmetic number, because the mean of its divisors is an integer number (156615255).

Almost surely, 2^313230509 is an apocalyptic number.

It is an amenable number.

313230509 is a deficient number, since it is larger than the sum of its proper divisors (1).

313230509 is an equidigital number, since it uses as much as digits as its factorization.

313230509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 26.

The square root of 313230509 is about 17698.3193834895. The cubic root of 313230509 is about 679.1327677227.

The spelling of 313230509 in words is "three hundred thirteen million, two hundred thirty thousand, five hundred nine".