399688177 has 16 divisors (see below), whose sum is σ = 475267072. Its totient is φ = 328905360.

The previous prime is 399688169. The next prime is 399688183. The reversal of 399688177 is 771886993.

It is not a de Polignac number, because 399688177 - 2³ = 399688169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (399688147) 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, 20308 + ... + 34810.

It is an arithmetic number, because the mean of its divisors is an integer number (29704192).

Almost surely, 2^399688177 is an apocalyptic number.

It is an amenable number.

399688177 is a deficient number, since it is larger than the sum of its proper divisors (75578895).

399688177 is a wasteful number, since it uses less digits than its factorization.

399688177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14668.

The product of its digits is 4572288, while the sum is 58.

The square root of 399688177 is about 19992.2029051328. The cubic root of 399688177 is about 736.6147889959.

The spelling of 399688177 in words is "three hundred ninety-nine million, six hundred eighty-eight thousand, one hundred seventy-seven".