989892723 has 32 divisors (see below), whose sum is σ = 1432949760. Its totient is φ = 605797920.

The previous prime is 989892719. The next prime is 989892749. The reversal of 989892723 is 327298989.

It is not a de Polignac number, because 989892723 - 2² = 989892719 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (989892703) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 319540 + ... + 322622.

It is an arithmetic number, because the mean of its divisors is an integer number (44779680).

Almost surely, 2^989892723 is an apocalyptic number.

989892723 is a deficient number, since it is larger than the sum of its proper divisors (443057037).

989892723 is a wasteful number, since it uses less digits than its factorization.

989892723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3279.

The product of its digits is 3919104, while the sum is 57.

The square root of 989892723 is about 31462.5606554838. The cubic root of 989892723 is about 996.6194927144.

The spelling of 989892723 in words is "nine hundred eighty-nine million, eight hundred ninety-two thousand, seven hundred twenty-three".