318139745 has 32 divisors (see below), whose sum is σ = 477031680. Its totient is φ = 197879040.

The previous prime is 318139721. The next prime is 318139769. The reversal of 318139745 is 547931813.

It is an interprime number because it is at equal distance from previous prime (318139721) and next prime (318139769).

It is not a de Polignac number, because 318139745 - 2¹⁶ = 318074209 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 297071 + ... + 298139.

It is an arithmetic number, because the mean of its divisors is an integer number (14907240).

Almost surely, 2^318139745 is an apocalyptic number.

318139745 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

318139745 is a deficient number, since it is larger than the sum of its proper divisors (158891935).

318139745 is a wasteful number, since it uses less digits than its factorization.

318139745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1865.

The product of its digits is 90720, while the sum is 41.

The square root of 318139745 is about 17836.4723249862. The cubic root of 318139745 is about 682.6623889602.

The spelling of 318139745 in words is "three hundred eighteen million, one hundred thirty-nine thousand, seven hundred forty-five".