399417 has 8 divisors (see below), whose sum is σ = 551040. Its totient is φ = 257040.

The previous prime is 399409. The next prime is 399433. The reversal of 399417 is 714993.

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

It is not a de Polignac number, because 399417 - 2³ = 399409 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399617) 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, 2209 + ... + 2382.

It is an arithmetic number, because the mean of its divisors is an integer number (68880).

2³⁹⁹⁴¹⁷ is an apocalyptic number.

It is an amenable number.

399417 is a deficient number, since it is larger than the sum of its proper divisors (151623).

399417 is a wasteful number, since it uses less digits than its factorization.

399417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4623.

The product of its digits is 6804, while the sum is 33.

The square root of 399417 is about 631.9944620011. The cubic root of 399417 is about 73.6448160615.

The spelling of 399417 in words is "three hundred ninety-nine thousand, four hundred seventeen".