313670309 has 2 divisors, whose sum is σ = 313670310. Its totient is φ = 313670308.

The previous prime is 313670263. The next prime is 313670317. The reversal of 313670309 is 903076313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 303526084 + 10144225 = 17422^2 + 3185^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313670309 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313670209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156835154 + 156835155.

It is an arithmetic number, because the mean of its divisors is an integer number (156835155).

Almost surely, 2^313670309 is an apocalyptic number.

It is an amenable number.

313670309 is a deficient number, since it is larger than the sum of its proper divisors (1).

313670309 is an equidigital number, since it uses as much as digits as its factorization.

313670309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 32.

The square root of 313670309 is about 17710.7399337238. The cubic root of 313670309 is about 679.4504708204.

The spelling of 313670309 in words is "three hundred thirteen million, six hundred seventy thousand, three hundred nine".