390871317 has 8 divisors (see below), whose sum is σ = 532250496. Its totient is φ = 255036512.

The previous prime is 390871303. The next prime is 390871337. The reversal of 390871317 is 713178093.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 390871317 - 2⁷ = 390871189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390871337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1385928 + ... + 1386209.

It is an arithmetic number, because the mean of its divisors is an integer number (66531312).

Almost surely, 2^390871317 is an apocalyptic number.

It is an amenable number.

390871317 is a deficient number, since it is larger than the sum of its proper divisors (141379179).

390871317 is a wasteful number, since it uses less digits than its factorization.

390871317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2772187.

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 390871317 is about 19770.4657760003. The cubic root of 390871317 is about 731.1580524612.

It can be divided in two parts, 39087 and 1317, that added together give a palindrome (40404).

The spelling of 390871317 in words is "three hundred ninety million, eight hundred seventy-one thousand, three hundred seventeen".