998190323 has 4 divisors (see below), whose sum is σ = 1074974208. Its totient is φ = 921406440.

The previous prime is 998190311. The next prime is 998190337. The reversal of 998190323 is 323091899.

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 998190323 - 2¹⁸ = 997928179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998190623) 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, 38391923 + ... + 38391948.

It is an arithmetic number, because the mean of its divisors is an integer number (268743552).

Almost surely, 2^998190323 is an apocalyptic number.

998190323 is a deficient number, since it is larger than the sum of its proper divisors (76783885).

998190323 is a wasteful number, since it uses less digits than its factorization.

998190323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76783884.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 998190323 is about 31594.1501389102. The cubic root of 998190323 is about 999.3964100858.

The spelling of 998190323 in words is "nine hundred ninety-eight million, one hundred ninety thousand, three hundred twenty-three".