318396893 has 4 divisors (see below), whose sum is σ = 337126140. Its totient is φ = 299667648.

The previous prime is 318396853. The next prime is 318396899. The reversal of 318396893 is 398693813.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 119530489 + 198866404 = 10933^2 + 14102^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318396893 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 (318396899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9364598 + ... + 9364631.

It is an arithmetic number, because the mean of its divisors is an integer number (84281535).

Almost surely, 2^318396893 is an apocalyptic number.

It is an amenable number.

318396893 is a deficient number, since it is larger than the sum of its proper divisors (18729247).

318396893 is a wasteful number, since it uses less digits than its factorization.

318396893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18729246.

The product of its digits is 839808, while the sum is 50.

The square root of 318396893 is about 17843.6793571281. The cubic root of 318396893 is about 682.8462683141.

The spelling of 318396893 in words is "three hundred eighteen million, three hundred ninety-six thousand, eight hundred ninety-three".