313236989 has 12 divisors (see below), whose sum is σ = 348578748. Its totient is φ = 279803520.

The previous prime is 313236961. The next prime is 313237003. The reversal of 313236989 is 989632313.

It can be written as a sum of positive squares in 2 ways, for example, as 82500889 + 230736100 = 9083^2 + 15190^2 .

It is not a de Polignac number, because 313236989 - 2⁸ = 313236733 is a prime.

It is a super-2 number, since 2×313236989² = 196234822555572242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313236919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44 + ... + 25029.

It is an arithmetic number, because the mean of its divisors is an integer number (29048229).

Almost surely, 2^313236989 is an apocalyptic number.

It is an amenable number.

313236989 is a deficient number, since it is larger than the sum of its proper divisors (35341759).

313236989 is a wasteful number, since it uses less digits than its factorization.

313236989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25148 (or 25117 counting only the distinct ones).

The product of its digits is 209952, while the sum is 44.

The square root of 313236989 is about 17698.5024507725. The cubic root of 313236989 is about 679.1374509085.

The spelling of 313236989 in words is "three hundred thirteen million, two hundred thirty-six thousand, nine hundred eighty-nine".