313808399 has 2 divisors, whose sum is σ = 313808400. Its totient is φ = 313808398.

The previous prime is 313808387. The next prime is 313808413. The reversal of 313808399 is 993808313.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313808399 is a prime.

It is a super-2 number, since 2×313808399² = 196951422565886402, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313808329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156904199 + 156904200.

It is an arithmetic number, because the mean of its divisors is an integer number (156904200).

Almost surely, 2^313808399 is an apocalyptic number.

313808399 is a deficient number, since it is larger than the sum of its proper divisors (1).

313808399 is an equidigital number, since it uses as much as digits as its factorization.

313808399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 313808399 is about 17714.6379867047. The cubic root of 313808399 is about 679.5501631275.

The spelling of 313808399 in words is "three hundred thirteen million, eight hundred eight thousand, three hundred ninety-nine".