313451989 has 2 divisors, whose sum is σ = 313451990. Its totient is φ = 313451988.

The previous prime is 313451959. The next prime is 313452043. The reversal of 313451989 is 989154313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 290123089 + 23328900 = 17033^2 + 4830^2 .

It is a cyclic number.

It is not a de Polignac number, because 313451989 - 2⁷ = 313451861 is a prime.

It is a super-2 number, since 2×313451989² = 196504298816112242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313451909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156725994 + 156725995.

It is an arithmetic number, because the mean of its divisors is an integer number (156725995).

Almost surely, 2^313451989 is an apocalyptic number.

It is an amenable number.

313451989 is a deficient number, since it is larger than the sum of its proper divisors (1).

313451989 is an equidigital number, since it uses as much as digits as its factorization.

313451989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 43.

The square root of 313451989 is about 17704.5753690960. The cubic root of 313451989 is about 679.2927977785.

The spelling of 313451989 in words is "three hundred thirteen million, four hundred fifty-one thousand, nine hundred eighty-nine".