318394917 has 6 divisors (see below), whose sum is σ = 459903782. Its totient is φ = 212263272.

The previous prime is 318394897. The next prime is 318394931. The reversal of 318394917 is 719493813.

It can be written as a sum of positive squares in only one way, i.e., 318301281 + 93636 = 17841^2 + 306^2 .

It is not a de Polignac number, because 318394917 - 2¹⁶ = 318329381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318392917) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17688598 + ... + 17688615.

Almost surely, 2^318394917 is an apocalyptic number.

It is an amenable number.

318394917 is a deficient number, since it is larger than the sum of its proper divisors (141508865).

318394917 is a wasteful number, since it uses less digits than its factorization.

318394917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35377219 (or 35377216 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 318394917 is about 17843.6239872959. The cubic root of 318394917 is about 682.8448557092.

The spelling of 318394917 in words is "three hundred eighteen million, three hundred ninety-four thousand, nine hundred seventeen".