313919621 has 2 divisors, whose sum is σ = 313919622. Its totient is φ = 313919620.

The previous prime is 313919587. The next prime is 313919629. The reversal of 313919621 is 126919313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 313679521 + 240100 = 17711^2 + 490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313919621 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 (313919629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156959810 + 156959811.

It is an arithmetic number, because the mean of its divisors is an integer number (156959811).

Almost surely, 2^313919621 is an apocalyptic number.

It is an amenable number.

313919621 is a deficient number, since it is larger than the sum of its proper divisors (1).

313919621 is an equidigital number, since it uses as much as digits as its factorization.

313919621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8748, while the sum is 35.

The square root of 313919621 is about 17717.7769768106. The cubic root of 313919621 is about 679.6304371641.

The spelling of 313919621 in words is "three hundred thirteen million, nine hundred nineteen thousand, six hundred twenty-one".