399086171 has 8 divisors (see below), whose sum is σ = 435621888. Its totient is φ = 362593000.

The previous prime is 399086167. The next prime is 399086183. The reversal of 399086171 is 171680993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 399086171 - 2² = 399086167 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399086671) 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, 10886 + ... + 30276.

It is an arithmetic number, because the mean of its divisors is an integer number (54452736).

Almost surely, 2^399086171 is an apocalyptic number.

399086171 is a deficient number, since it is larger than the sum of its proper divisors (36535717).

399086171 is a wasteful number, since it uses less digits than its factorization.

399086171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21273.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 399086171 is about 19977.1412118952. The cubic root of 399086171 is about 736.2447760935.

The spelling of 399086171 in words is "three hundred ninety-nine million, eighty-six thousand, one hundred seventy-one".