399990177 has 8 divisors (see below), whose sum is σ = 592578080. Its totient is φ = 266660100.

The previous prime is 399990167. The next prime is 399990203. The reversal of 399990177 is 771099993.

It is not a de Polignac number, because 399990177 - 2⁶ = 399990113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399990167) 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, 7407199 + ... + 7407252.

It is an arithmetic number, because the mean of its divisors is an integer number (74072260).

Almost surely, 2^399990177 is an apocalyptic number.

It is an amenable number.

399990177 is a deficient number, since it is larger than the sum of its proper divisors (192587903).

399990177 is a wasteful number, since it uses less digits than its factorization.

399990177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14814460 (or 14814454 counting only the distinct ones).

The product of its (nonzero) digits is 964467, while the sum is 54.

The square root of 399990177 is about 19999.7544234923. The cubic root of 399990177 is about 736.8002683051.

The spelling of 399990177 in words is "three hundred ninety-nine million, nine hundred ninety thousand, one hundred seventy-seven".