399110717 has 8 divisors (see below), whose sum is σ = 422767800. Its totient is φ = 375473664.

The previous prime is 399110707. The next prime is 399110737. The reversal of 399110717 is 717011993.

It can be written as a sum of positive squares in 4 ways, for example, as 174530521 + 224580196 = 13211^2 + 14986^2 .

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 399110717 - 2¹⁰ = 399109693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399110707) 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, 60959 + ... + 67187.

It is an arithmetic number, because the mean of its divisors is an integer number (52845975).

Almost surely, 2^399110717 is an apocalyptic number.

It is an amenable number.

399110717 is a deficient number, since it is larger than the sum of its proper divisors (23657083).

399110717 is a wasteful number, since it uses less digits than its factorization.

399110717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10015.

The product of its (nonzero) digits is 11907, while the sum is 38.

The square root of 399110717 is about 19977.7555546162. The cubic root of 399110717 is about 736.2598701552.

The spelling of 399110717 in words is "three hundred ninety-nine million, one hundred ten thousand, seven hundred seventeen".