313856969 has 2 divisors, whose sum is σ = 313856970. Its totient is φ = 313856968.

The previous prime is 313856923. The next prime is 313856971. The reversal of 313856969 is 969658313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222367744 + 91489225 = 14912^2 + 9565^2 .

It is a cyclic number.

It is not a de Polignac number, because 313856969 - 2⁸ = 313856713 is a prime.

It is a super-2 number, since 2×313856969² = 197012393979733922, which contains 22 as substring.

Together with 313856971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (313856069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156928484 + 156928485.

It is an arithmetic number, because the mean of its divisors is an integer number (156928485).

Almost surely, 2^313856969 is an apocalyptic number.

It is an amenable number.

313856969 is a deficient number, since it is larger than the sum of its proper divisors (1).

313856969 is an equidigital number, since it uses as much as digits as its factorization.

313856969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1049760, while the sum is 50.

The square root of 313856969 is about 17716.0088338203. The cubic root of 313856969 is about 679.5852206646.

The spelling of 313856969 in words is "three hundred thirteen million, eight hundred fifty-six thousand, nine hundred sixty-nine".