398159 has 4 divisors (see below), whose sum is σ = 400416. Its totient is φ = 395904.

The previous prime is 398149. The next prime is 398171. The reversal of 398159 is 951893.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 398159 - 2⁴ = 398143 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 (398119) 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, 839 + ... + 1224.

It is an arithmetic number, because the mean of its divisors is an integer number (100104).

2³⁹⁸¹⁵⁹ is an apocalyptic number.

398159 is a deficient number, since it is larger than the sum of its proper divisors (2257).

398159 is a wasteful number, since it uses less digits than its factorization.

398159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2256.

The product of its digits is 9720, while the sum is 35.

The square root of 398159 is about 630.9984152120. The cubic root of 398159 is about 73.5674177418.

The spelling of 398159 in words is "three hundred ninety-eight thousand, one hundred fifty-nine".