313122389 has 2 divisors, whose sum is σ = 313122390. Its totient is φ = 313122388.

The previous prime is 313122349. The next prime is 313122401. The reversal of 313122389 is 983221313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160402225 + 152720164 = 12665^2 + 12358^2 .

It is a cyclic number.

It is not a de Polignac number, because 313122389 - 2¹² = 313118293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313122349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156561194 + 156561195.

It is an arithmetic number, because the mean of its divisors is an integer number (156561195).

Almost surely, 2^313122389 is an apocalyptic number.

It is an amenable number.

313122389 is a deficient number, since it is larger than the sum of its proper divisors (1).

313122389 is an equidigital number, since it uses as much as digits as its factorization.

313122389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 32.

The square root of 313122389 is about 17695.2645925400. The cubic root of 313122389 is about 679.0546183695.

The spelling of 313122389 in words is "three hundred thirteen million, one hundred twenty-two thousand, three hundred eighty-nine".