399599977 has 16 divisors (see below), whose sum is σ = 484081920. Its totient is φ = 322011648.

The previous prime is 399599929. The next prime is 399599983. The reversal of 399599977 is 779995993.

It is a de Polignac number, because none of the positive numbers 2^k-399599977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (399599917) 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, 190428 + ... + 192514.

It is an arithmetic number, because the mean of its divisors is an integer number (30255120).

Almost surely, 2^399599977 is an apocalyptic number.

It is an amenable number.

399599977 is a deficient number, since it is larger than the sum of its proper divisors (84481943).

399599977 is a wasteful number, since it uses less digits than its factorization.

399599977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3720.

The product of its digits is 43401015, while the sum is 67.

The square root of 399599977 is about 19989.9969234615. The cubic root of 399599977 is about 736.5606015837.

The spelling of 399599977 in words is "three hundred ninety-nine million, five hundred ninety-nine thousand, nine hundred seventy-seven".