99015320889 has 15 divisors (see below), whose sum is σ = 147916006293. Its totient is φ = 66008325924.

The previous prime is 99015320821. The next prime is 99015320891. The reversal of 99015320889 is 98802351099.

The square root of 99015320889 is 314667.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 99015320889 - 2⁹ = 99015320377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99015320809) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 2814522 + ... + 2849484.

Almost surely, 2^99015320889 is an apocalyptic number.

99015320889 is the 314667-th square number.

99015320889 is the 157334-th centered octagonal number.

It is an amenable number.

99015320889 is a deficient number, since it is larger than the sum of its proper divisors (48900685404).

99015320889 is an frugal number, since it uses more digits than its factorization.

99015320889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69938 (or 34966 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 54.

It can be divided in two parts, 99015 and 320889, that added together give a square (419904 = 648²).

The spelling of 99015320889 in words is "ninety-nine billion, fifteen million, three hundred twenty thousand, eight hundred eighty-nine".