889991520123 has 8 divisors (see below), whose sum is σ = 1186753503568. Its totient is φ = 593278608384.

The previous prime is 889991520101. The next prime is 889991520191. The reversal of 889991520123 is 321025199988.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 889991520123 - 2⁸ = 889991519867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (889991530123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12225586 + ... + 12298167.

It is an arithmetic number, because the mean of its divisors is an integer number (148344187946).

Almost surely, 2^889991520123 is an apocalyptic number.

889991520123 is a deficient number, since it is larger than the sum of its proper divisors (296761983445).

889991520123 is a wasteful number, since it uses less digits than its factorization.

889991520123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24535853.

The product of its (nonzero) digits is 2799360, while the sum is 57.

The spelling of 889991520123 in words is "eight hundred eighty-nine billion, nine hundred ninety-one million, five hundred twenty thousand, one hundred twenty-three".