313039813 has 2 divisors, whose sum is σ = 313039814. Its totient is φ = 313039812.

The previous prime is 313039777. The next prime is 313039843. The reversal of 313039813 is 318930313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 271656324 + 41383489 = 16482^2 + 6433^2 .

It is a cyclic number.

It is not a de Polignac number, because 313039813 - 2⁹ = 313039301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313039843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156519906 + 156519907.

It is an arithmetic number, because the mean of its divisors is an integer number (156519907).

Almost surely, 2^313039813 is an apocalyptic number.

It is an amenable number.

313039813 is a deficient number, since it is larger than the sum of its proper divisors (1).

313039813 is an equidigital number, since it uses as much as digits as its factorization.

313039813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 313039813 is about 17692.9311590816. The cubic root of 313039813 is about 678.9949201535.

The spelling of 313039813 in words is "three hundred thirteen million, thirty-nine thousand, eight hundred thirteen".