989997849323 has 4 divisors (see below), whose sum is σ = 1131426113520. Its totient is φ = 848569585128.

The previous prime is 989997849307. The next prime is 989997849329. The reversal of 989997849323 is 323948799989.

989997849323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 989997849323 - 2⁴ = 989997849307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989997849329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70714132088 + ... + 70714132101.

It is an arithmetic number, because the mean of its divisors is an integer number (282856528380).

Almost surely, 2^989997849323 is an apocalyptic number.

989997849323 is a deficient number, since it is larger than the sum of its proper divisors (141428264197).

989997849323 is a wasteful number, since it uses less digits than its factorization.

989997849323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141428264196.

The product of its digits is 1904684544, while the sum is 80.

The spelling of 989997849323 in words is "nine hundred eighty-nine billion, nine hundred ninety-seven million, eight hundred forty-nine thousand, three hundred twenty-three".