998133939 has 24 divisors (see below), whose sum is σ = 1623558144. Its totient is φ = 585414000.

The previous prime is 998133883. The next prime is 998133943. The reversal of 998133939 is 939331899.

It is not a de Polignac number, because 998133939 - 2¹¹ = 998131891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (998133979) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159547 + ... + 165684.

It is an arithmetic number, because the mean of its divisors is an integer number (67648256).

Almost surely, 2^998133939 is an apocalyptic number.

998133939 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

998133939 is a deficient number, since it is larger than the sum of its proper divisors (625424205).

998133939 is a wasteful number, since it uses less digits than its factorization.

998133939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325279 (or 325276 counting only the distinct ones).

The product of its digits is 1417176, while the sum is 54.

The square root of 998133939 is about 31593.2578092225. The cubic root of 998133939 is about 999.3775923558.

The spelling of 998133939 in words is "nine hundred ninety-eight million, one hundred thirty-three thousand, nine hundred thirty-nine".