399189 has 8 divisors (see below), whose sum is σ = 608320. Its totient is φ = 228096.

The previous prime is 399181. The next prime is 399197. The reversal of 399189 is 981993.

It is an interprime number because it is at equal distance from previous prime (399181) and next prime (399197).

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

It is not a de Polignac number, because 399189 - 2³ = 399181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399181) 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, 9484 + ... + 9525.

It is an arithmetic number, because the mean of its divisors is an integer number (76040).

2³⁹⁹¹⁸⁹ is an apocalyptic number.

It is an amenable number.

399189 is a deficient number, since it is larger than the sum of its proper divisors (209131).

399189 is a wasteful number, since it uses less digits than its factorization.

399189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19019.

The product of its digits is 17496, while the sum is 39.

The square root of 399189 is about 631.8140549244. The cubic root of 399189 is about 73.6308004554.

The spelling of 399189 in words is "three hundred ninety-nine thousand, one hundred eighty-nine".