398899 has 4 divisors (see below), whose sum is σ = 405720. Its totient is φ = 392080.

The previous prime is 398887. The next prime is 398903. The reversal of 398899 is 998893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 998893 = 7 ⋅142699.

It is a cyclic number.

It is not a de Polignac number, because 398899 - 2⁷ = 398771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398819) 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, 3322 + ... + 3439.

It is an arithmetic number, because the mean of its divisors is an integer number (101430).

2³⁹⁸⁸⁹⁹ is an apocalyptic number.

398899 is a deficient number, since it is larger than the sum of its proper divisors (6821).

398899 is an equidigital number, since it uses as much as digits as its factorization.

398899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6820.

The product of its digits is 139968, while the sum is 46.

The square root of 398899 is about 631.5845153263. The cubic root of 398899 is about 73.6129658750.

The spelling of 398899 in words is "three hundred ninety-eight thousand, eight hundred ninety-nine".