313585309 has 2 divisors, whose sum is σ = 313585310. Its totient is φ = 313585308.

The previous prime is 313585303. The next prime is 313585319. The reversal of 313585309 is 903585313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158508100 + 155077209 = 12590^2 + 12453^2 .

It is a cyclic number.

It is not a de Polignac number, because 313585309 - 2²³ = 305196701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313585303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156792654 + 156792655.

It is an arithmetic number, because the mean of its divisors is an integer number (156792655).

Almost surely, 2^313585309 is an apocalyptic number.

It is an amenable number.

313585309 is a deficient number, since it is larger than the sum of its proper divisors (1).

313585309 is an equidigital number, since it uses as much as digits as its factorization.

313585309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 313585309 is about 17708.3400972536. The cubic root of 313585309 is about 679.3890916101.

The spelling of 313585309 in words is "three hundred thirteen million, five hundred eighty-five thousand, three hundred nine".