399167 has 4 divisors (see below), whose sum is σ = 400440. Its totient is φ = 397896.

The previous prime is 399163. The next prime is 399173. The reversal of 399167 is 761993.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 399167 - 2² = 399163 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 399167.

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 3 ways as a sum of consecutive naturals, for example, 209 + ... + 917.

It is an arithmetic number, because the mean of its divisors is an integer number (100110).

2³⁹⁹¹⁶⁷ is an apocalyptic number.

399167 is a deficient number, since it is larger than the sum of its proper divisors (1273).

399167 is an equidigital number, since it uses as much as digits as its factorization.

399167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272.

The product of its digits is 10206, while the sum is 35.

The square root of 399167 is about 631.7966444988. The cubic root of 399167 is about 73.6294477901.

The spelling of 399167 in words is "three hundred ninety-nine thousand, one hundred sixty-seven".