999343998 has 12 divisors (see below), whose sum is σ = 2165245368. Its totient is φ = 333114660.

The previous prime is 999343909. The next prime is 999344023. The reversal of 999343998 is 899343999.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27759538 + ... + 27759573.

It is an arithmetic number, because the mean of its divisors is an integer number (180437114).

Almost surely, 2^999343998 is an apocalyptic number.

999343998 is an abundant number, since it is smaller than the sum of its proper divisors (1165901370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999343998 is a wasteful number, since it uses less digits than its factorization.

999343998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55519119 (or 55519116 counting only the distinct ones).

The product of its digits is 17006112, while the sum is 63.

The square root of 999343998 is about 31612.4025977147. The cubic root of 999343998 is about 999.7812848338.

Subtracting from 999343998 its reverse (899343999), we obtain a palindrome (99999999).

The spelling of 999343998 in words is "nine hundred ninety-nine million, three hundred forty-three thousand, nine hundred ninety-eight".