989653623 has 48 divisors (see below), whose sum is σ = 1657505280. Its totient is φ = 513805824.

The previous prime is 989653607. The next prime is 989653633. The reversal of 989653623 is 326356989.

It is not a de Polignac number, because 989653623 - 2⁴ = 989653607 is a prime.

It is a super-2 number, since 2×989653623² = 1958828587034052258, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989653603) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 173190 + ... + 178812.

It is an arithmetic number, because the mean of its divisors is an integer number (34531360).

Almost surely, 2^989653623 is an apocalyptic number.

989653623 is a deficient number, since it is larger than the sum of its proper divisors (667851657).

989653623 is a wasteful number, since it uses less digits than its factorization.

989653623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5696 (or 5679 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 51.

The square root of 989653623 is about 31458.7606717111. The cubic root of 989653623 is about 996.5392446554.

The spelling of 989653623 in words is "nine hundred eighty-nine million, six hundred fifty-three thousand, six hundred twenty-three".