398579 has 4 divisors (see below), whose sum is σ = 400680. Its totient is φ = 396480.

The previous prime is 398569. The next prime is 398581. The reversal of 398579 is 975893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 975893 = 173 ⋅5641.

It is a cyclic number.

It is not a de Polignac number, because 398579 - 2⁸ = 398323 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (398509) 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, 734 + ... + 1155.

It is an arithmetic number, because the mean of its divisors is an integer number (100170).

2³⁹⁸⁵⁷⁹ is an apocalyptic number.

398579 is a deficient number, since it is larger than the sum of its proper divisors (2101).

398579 is a wasteful number, since it uses less digits than its factorization.

398579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100.

The product of its digits is 68040, while the sum is 41.

The square root of 398579 is about 631.3311333999. The cubic root of 398579 is about 73.5932763037.

The spelling of 398579 in words is "three hundred ninety-eight thousand, five hundred seventy-nine".