313089989 has 2 divisors, whose sum is σ = 313089990. Its totient is φ = 313089988.

The previous prime is 313089979. The next prime is 313089991. The reversal of 313089989 is 989980313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 276390625 + 36699364 = 16625^2 + 6058^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313089989 is a prime.

Together with 313089991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313089929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156544994 + 156544995.

It is an arithmetic number, because the mean of its divisors is an integer number (156544995).

Almost surely, 2^313089989 is an apocalyptic number.

It is an amenable number.

313089989 is a deficient number, since it is larger than the sum of its proper divisors (1).

313089989 is an equidigital number, since it uses as much as digits as its factorization.

313089989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 50.

The square root of 313089989 is about 17694.3490696889. The cubic root of 313089989 is about 679.0311960813.

The spelling of 313089989 in words is "three hundred thirteen million, eighty-nine thousand, nine hundred eighty-nine".