399596917 has 16 divisors (see below), whose sum is σ = 446497920. Its totient is φ = 355666432.

The previous prime is 399596903. The next prime is 399596933. The reversal of 399596917 is 719695993.

It is a cyclic number.

It is not a de Polignac number, because 399596917 - 2¹⁵ = 399564149 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 (399596117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29058 + ... + 40540.

It is an arithmetic number, because the mean of its divisors is an integer number (27906120).

Almost surely, 2^399596917 is an apocalyptic number.

It is an amenable number.

399596917 is a deficient number, since it is larger than the sum of its proper divisors (46901003).

399596917 is a wasteful number, since it uses less digits than its factorization.

399596917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11612.

The product of its digits is 4133430, while the sum is 58.

The square root of 399596917 is about 19989.9203850341. The cubic root of 399596917 is about 736.5587214692.

The spelling of 399596917 in words is "three hundred ninety-nine million, five hundred ninety-six thousand, nine hundred seventeen".