998393 has 16 divisors (see below), whose sum is σ = 1218240. Its totient is φ = 806400.

The previous prime is 998381. The next prime is 998399. The reversal of 998393 is 393899.

It is a cyclic number.

It is not a de Polignac number, because 998393 - 2⁴ = 998377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 998393.

It is not an unprimeable number, because it can be changed into a prime (998399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3413 + ... + 3693.

It is an arithmetic number, because the mean of its divisors is an integer number (76140).

2⁹⁹⁸³⁹³ is an apocalyptic number.

It is an amenable number.

998393 is a deficient number, since it is larger than the sum of its proper divisors (219847).

998393 is a wasteful number, since it uses less digits than its factorization.

998393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328.

The product of its digits is 52488, while the sum is 41.

The square root of 998393 is about 999.1961769342. The cubic root of 998393 is about 99.9464046138.

The spelling of 998393 in words is "nine hundred ninety-eight thousand, three hundred ninety-three".