399017 has 4 divisors (see below), whose sum is σ = 405840. Its totient is φ = 392196.

The previous prime is 398989. The next prime is 399023. The reversal of 399017 is 710993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 710993 = 29 ⋅24517.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399067) 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, 3323 + ... + 3440.

It is an arithmetic number, because the mean of its divisors is an integer number (101460).

2³⁹⁹⁰¹⁷ is an apocalyptic number.

It is an amenable number.

399017 is a deficient number, since it is larger than the sum of its proper divisors (6823).

399017 is an equidigital number, since it uses as much as digits as its factorization.

399017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6822.

The product of its (nonzero) digits is 1701, while the sum is 29.

The square root of 399017 is about 631.6779242620. The cubic root of 399017 is about 73.6202237469.

The spelling of 399017 in words is "three hundred ninety-nine thousand, seventeen".