317662639 has 12 divisors (see below), whose sum is σ = 374592144. Its totient is φ = 268549344.

The previous prime is 317662633. The next prime is 317662661. The reversal of 317662639 is 936266713.

It is not a de Polignac number, because 317662639 - 2⁷ = 317662511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 317662595 and 317662604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (317662633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40827 + ... + 47980.

It is an arithmetic number, because the mean of its divisors is an integer number (31216012).

Almost surely, 2^317662639 is an apocalyptic number.

317662639 is a deficient number, since it is larger than the sum of its proper divisors (56929505).

317662639 is an equidigital number, since it uses as much as digits as its factorization.

317662639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88894 (or 88887 counting only the distinct ones).

The product of its digits is 244944, while the sum is 43.

The square root of 317662639 is about 17823.0928573017. The cubic root of 317662639 is about 682.3209611459.

The spelling of 317662639 in words is "three hundred seventeen million, six hundred sixty-two thousand, six hundred thirty-nine".