998825579 has 4 divisors (see below), whose sum is σ = 999307176. Its totient is φ = 998343984.

The previous prime is 998825563. The next prime is 998825591. The reversal of 998825579 is 975528899.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 975528899 = 1151 ⋅847549.

It is a cyclic number.

It is not a de Polignac number, because 998825579 - 2⁴ = 998825563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998825539) 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, 237674 + ... + 241839.

It is an arithmetic number, because the mean of its divisors is an integer number (249826794).

Almost surely, 2^998825579 is an apocalyptic number.

998825579 is a deficient number, since it is larger than the sum of its proper divisors (481597).

998825579 is a wasteful number, since it uses less digits than its factorization.

998825579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481596.

The product of its digits is 16329600, while the sum is 62.

The square root of 998825579 is about 31604.2019199979. The cubic root of 998825579 is about 999.6083729816.

The spelling of 998825579 in words is "nine hundred ninety-eight million, eight hundred twenty-five thousand, five hundred seventy-nine".