8721940089 has 12 divisors (see below), whose sum is σ = 11646847536. Its totient is φ = 5805838368.

The previous prime is 8721940069. The next prime is 8721940093. The reversal of 8721940089 is 9800491278.

It is not a de Polignac number, because 8721940089 - 2⁵ = 8721940057 is a prime.

It is a super-2 number, since 2×8721940089² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8721940069) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5419917 + ... + 5421525.

It is an arithmetic number, because the mean of its divisors is an integer number (970570628).

Almost surely, 2^8721940089 is an apocalyptic number.

It is an amenable number.

8721940089 is a deficient number, since it is larger than the sum of its proper divisors (2924907447).

8721940089 is an equidigital number, since it uses as much as digits as its factorization.

8721940089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4344 (or 2735 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 48.

The square root of 8721940089 is about 93391.3276969548. The cubic root of 8721940089 is about 2058.4375692227.

The spelling of 8721940089 in words is "eight billion, seven hundred twenty-one million, nine hundred forty thousand, eighty-nine".