318996563 has 4 divisors (see below), whose sum is σ = 319081920. Its totient is φ = 318911208.

The previous prime is 318996547. The next prime is 318996571. The reversal of 318996563 is 365699813.

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

It is a cyclic number.

It is not a de Polignac number, because 318996563 - 2⁴ = 318996547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318996533) 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, 36803 + ... + 44636.

It is an arithmetic number, because the mean of its divisors is an integer number (79770480).

Almost surely, 2^318996563 is an apocalyptic number.

318996563 is a deficient number, since it is larger than the sum of its proper divisors (85357).

318996563 is an equidigital number, since it uses as much as digits as its factorization.

318996563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85356.

The product of its digits is 1049760, while the sum is 50.

The square root of 318996563 is about 17860.4748817046. The cubic root of 318996563 is about 683.2746912727.

The spelling of 318996563 in words is "three hundred eighteen million, nine hundred ninety-six thousand, five hundred sixty-three".