998359 has 4 divisors (see below), whose sum is σ = 1057104. Its totient is φ = 939616.

The previous prime is 998353. The next prime is 998377. The reversal of 998359 is 953899.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 953899 = 433 ⋅2203.

It is a cyclic number.

It is not a de Polignac number, because 998359 - 2¹¹ = 996311 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 (998353) 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, 29347 + ... + 29380.

It is an arithmetic number, because the mean of its divisors is an integer number (264276).

2⁹⁹⁸³⁵⁹ is an apocalyptic number.

998359 is a deficient number, since it is larger than the sum of its proper divisors (58745).

998359 is a wasteful number, since it uses less digits than its factorization.

998359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58744.

The product of its digits is 87480, while the sum is 43.

The square root of 998359 is about 999.1791631134. The cubic root of 998359 is about 99.9452700518.

It can be divided in two parts, 99 and 8359, that multiplied together give a triangular number (827541 = T₁₂₈₆).

The spelling of 998359 in words is "nine hundred ninety-eight thousand, three hundred fifty-nine".