318999947 has 16 divisors (see below), whose sum is σ = 377280000. Its totient is φ = 269556840.

The previous prime is 318999943. The next prime is 318999973. The reversal of 318999947 is 749999813.

It is not a de Polignac number, because 318999947 - 2² = 318999943 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318999943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17804 + ... + 30902.

It is an arithmetic number, because the mean of its divisors is an integer number (23580000).

Almost surely, 2^318999947 is an apocalyptic number.

318999947 is a deficient number, since it is larger than the sum of its proper divisors (58280053).

318999947 is an equidigital number, since it uses as much as digits as its factorization.

318999947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13191 (or 13177 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 59.

The square root of 318999947 is about 17860.5696157765. The cubic root of 318999947 is about 683.2771073838.

The spelling of 318999947 in words is "three hundred eighteen million, nine hundred ninety-nine thousand, nine hundred forty-seven".