313112509 has 2 divisors, whose sum is σ = 313112510. Its totient is φ = 313112508.

The previous prime is 313112497. The next prime is 313112521. The reversal of 313112509 is 905211313.

It is a balanced prime because it is at equal distance from previous prime (313112497) and next prime (313112521).

It can be written as a sum of positive squares in only one way, i.e., 274399225 + 38713284 = 16565^2 + 6222^2 .

It is a cyclic number.

It is not a de Polignac number, because 313112509 - 2¹¹ = 313110461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313112599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156556254 + 156556255.

It is an arithmetic number, because the mean of its divisors is an integer number (156556255).

Almost surely, 2^313112509 is an apocalyptic number.

It is an amenable number.

313112509 is a deficient number, since it is larger than the sum of its proper divisors (1).

313112509 is an equidigital number, since it uses as much as digits as its factorization.

313112509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 313112509 is about 17694.9854196041. The cubic root of 313112509 is about 679.0474761887.

The spelling of 313112509 in words is "three hundred thirteen million, one hundred twelve thousand, five hundred nine".