99803550889 has 9 divisors (see below), whose sum is σ = 116100580701. Its totient is φ = 85544005260.

The previous prime is 99803550871. The next prime is 99803550937. The reversal of 99803550889 is 98805530899.

The square root of 99803550889 is 315917.

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

It is not a de Polignac number, because 99803550889 - 2⁵ = 99803550857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99803550889.

It is not an unprimeable number, because it can be changed into a prime (99803550809) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2188854 + ... + 2233984.

Almost surely, 2^99803550889 is an apocalyptic number.

99803550889 is the 315917-th square number.

99803550889 is the 157959-th centered octagonal number.

It is an amenable number.

99803550889 is a deficient number, since it is larger than the sum of its proper divisors (16297029812).

99803550889 is an frugal number, since it uses more digits than its factorization.

99803550889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90276 (or 45138 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 64.

Multiplying 99803550889 by its sum of digits (64), we get a square (6387427256896 = 2527336²).

The spelling of 99803550889 in words is "ninety-nine billion, eight hundred three million, five hundred fifty thousand, eight hundred eighty-nine".