989120123 has 4 divisors (see below), whose sum is σ = 1010165280. Its totient is φ = 968074968.

The previous prime is 989120117. The next prime is 989120141. The reversal of 989120123 is 321021989.

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 989120123 - 2¹⁰ = 989119099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989120423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10522508 + ... + 10522601.

It is an arithmetic number, because the mean of its divisors is an integer number (252541320).

Almost surely, 2^989120123 is an apocalyptic number.

989120123 is a deficient number, since it is larger than the sum of its proper divisors (21045157).

989120123 is a wasteful number, since it uses less digits than its factorization.

989120123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21045156.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 989120123 is about 31450.2801736328. The cubic root of 989120123 is about 996.3601418402.

The spelling of 989120123 in words is "nine hundred eighty-nine million, one hundred twenty thousand, one hundred twenty-three".