399322017 has 6 divisors (see below), whose sum is σ = 576798482. Its totient is φ = 266214672.

The previous prime is 399322009. The next prime is 399322051. The reversal of 399322017 is 710223993.

It can be written as a sum of positive squares in only one way, i.e., 312440976 + 86881041 = 17676^2 + 9321^2 .

It is not a de Polignac number, because 399322017 - 2³ = 399322009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399322717) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22184548 + ... + 22184565.

Almost surely, 2^399322017 is an apocalyptic number.

It is an amenable number.

399322017 is a deficient number, since it is larger than the sum of its proper divisors (177476465).

399322017 is a wasteful number, since it uses less digits than its factorization.

399322017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44369119 (or 44369116 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 399322017 is about 19983.0432367045. The cubic root of 399322017 is about 736.3897791899.

The spelling of 399322017 in words is "three hundred ninety-nine million, three hundred twenty-two thousand, seventeen".