399668059 has 20 divisors (see below), whose sum is σ = 490847240. Its totient is φ = 324505440.

The previous prime is 399668057. The next prime is 399668063. The reversal of 399668059 is 950866993.

It is not a de Polignac number, because 399668059 - 2¹ = 399668057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399668057) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 41239 + ... + 49999.

It is an arithmetic number, because the mean of its divisors is an integer number (24542362).

Almost surely, 2^399668059 is an apocalyptic number.

399668059 is a deficient number, since it is larger than the sum of its proper divisors (91179181).

399668059 is an frugal number, since it uses more digits than its factorization.

399668059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8808 (or 8787 counting only the distinct ones).

The product of its (nonzero) digits is 3149280, while the sum is 55.

The square root of 399668059 is about 19991.6997526473. The cubic root of 399668059 is about 736.6024298071.

The spelling of 399668059 in words is "three hundred ninety-nine million, six hundred sixty-eight thousand, fifty-nine".