872198089 has 9 divisors (see below), whose sum is σ = 1014838317. Its totient is φ = 747421164.

The previous prime is 872198083. The next prime is 872198123. The reversal of 872198089 is 980891278.

The square root of 872198089 is 29533.

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

It is not a de Polignac number, because 872198089 - 2⁵ = 872198057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (872198083) 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, 204622 + ... + 208840.

It is an arithmetic number, because the mean of its divisors is an integer number (112759813).

Almost surely, 2^872198089 is an apocalyptic number.

872198089 is the 29533-rd square number.

872198089 is the 14767-th centered octagonal number.

It is an amenable number.

872198089 is a deficient number, since it is larger than the sum of its proper divisors (142640228).

872198089 is an frugal number, since it uses more digits than its factorization.

872198089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8452 (or 4226 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 52.

The cubic root of 872198089 is about 955.4435734411.

The spelling of 872198089 in words is "eight hundred seventy-two million, one hundred ninety-eight thousand, eighty-nine".