988923979 has 16 divisors (see below), whose sum is σ = 1020872160. Its totient is φ = 957565440.

The previous prime is 988923967. The next prime is 988924033. The reversal of 988923979 is 979329889.

988923979 = T₂₅₆₇₅ + T₂₅₆₇₆ + T₂₅₆₇₇.

It is not a de Polignac number, because 988923979 - 2¹¹ = 988921931 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 988923979.

It is not an unprimeable number, because it can be changed into a prime (988963979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1775169 + ... + 1775725.

It is an arithmetic number, because the mean of its divisors is an integer number (63804510).

Almost surely, 2^988923979 is an apocalyptic number.

988923979 is the 25677-th centered triangular number.

988923979 is a deficient number, since it is larger than the sum of its proper divisors (31948181).

988923979 is a wasteful number, since it uses less digits than its factorization.

988923979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990.

The product of its digits is 17635968, while the sum is 64.

The square root of 988923979 is about 31447.1617002234. The cubic root of 988923979 is about 996.2942775842.

The spelling of 988923979 in words is "nine hundred eighty-eight million, nine hundred twenty-three thousand, nine hundred seventy-nine".