318749009 has 2 divisors, whose sum is σ = 318749010. Its totient is φ = 318749008.

The previous prime is 318748999. The next prime is 318749017. The reversal of 318749009 is 900947813.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216678400 + 102070609 = 14720^2 + 10103^2 .

It is a cyclic number.

It is not a de Polignac number, because 318749009 - 2²⁰ = 317700433 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (318749209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159374504 + 159374505.

It is an arithmetic number, because the mean of its divisors is an integer number (159374505).

Almost surely, 2^318749009 is an apocalyptic number.

It is an amenable number.

318749009 is a deficient number, since it is larger than the sum of its proper divisors (1).

318749009 is an equidigital number, since it uses as much as digits as its factorization.

318749009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 318749009 is about 17853.5433177843. The cubic root of 318749009 is about 683.0978961006.

The spelling of 318749009 in words is "three hundred eighteen million, seven hundred forty-nine thousand, nine".