399161 has 8 divisors (see below), whose sum is σ = 460800. Its totient is φ = 338688.

The previous prime is 399151. The next prime is 399163. The reversal of 399161 is 161993.

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

It is not a de Polignac number, because 399161 - 2⁶ = 399097 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 399161.

It is not an unprimeable number, because it can be changed into a prime (399163) 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, 665 + ... + 1113.

It is an arithmetic number, because the mean of its divisors is an integer number (57600).

2³⁹⁹¹⁶¹ is an apocalyptic number.

It is an amenable number.

399161 is a deficient number, since it is larger than the sum of its proper divisors (61639).

399161 is a wasteful number, since it uses less digits than its factorization.

399161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583.

The product of its digits is 1458, while the sum is 29.

The square root of 399161 is about 631.7918961177. The cubic root of 399161 is about 73.6290788727.

The spelling of 399161 in words is "three hundred ninety-nine thousand, one hundred sixty-one".