998099 has 4 divisors (see below), whose sum is σ = 1013064. Its totient is φ = 983136.

The previous prime is 998083. The next prime is 998111. The reversal of 998099 is 990899.

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 998099 - 2⁴ = 998083 is a prime.

It is a super-2 number, since 2×998099² = 1992403227602, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (998009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7382 + ... + 7515.

It is an arithmetic number, because the mean of its divisors is an integer number (253266).

2⁹⁹⁸⁰⁹⁹ is an apocalyptic number.

998099 is a deficient number, since it is larger than the sum of its proper divisors (14965).

998099 is a wasteful number, since it uses less digits than its factorization.

998099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14964.

The product of its (nonzero) digits is 52488, while the sum is 44.

The square root of 998099 is about 999.0490478450. The cubic root of 998099 is about 99.9365931375.

The spelling of 998099 in words is "nine hundred ninety-eight thousand, ninety-nine".