399699319 has 8 divisors (see below), whose sum is σ = 413048592. Its totient is φ = 386534400.

The previous prime is 399699317. The next prime is 399699323. The reversal of 399699319 is 913996993.

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 399699319 - 2¹ = 399699317 is a prime.

It is a super-2 number, since 2×399699319² = 319519091218127522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399699317) 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, 41674 + ... + 50359.

It is an arithmetic number, because the mean of its divisors is an integer number (51631074).

Almost surely, 2^399699319 is an apocalyptic number.

399699319 is a deficient number, since it is larger than the sum of its proper divisors (13349273).

399699319 is a wasteful number, since it uses less digits than its factorization.

399699319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92177.

The product of its digits is 3188646, while the sum is 58.

The square root of 399699319 is about 19992.4815618272. The cubic root of 399699319 is about 736.6216337365.

The spelling of 399699319 in words is "three hundred ninety-nine million, six hundred ninety-nine thousand, three hundred nineteen".