8089172921 has 16 divisors (see below), whose sum is σ = 8235414720. Its totient is φ = 7944532800.

The previous prime is 8089172869. The next prime is 8089172957. The reversal of 8089172921 is 1292719808.

It is a cyclic number.

It is not a de Polignac number, because 8089172921 - 2²² = 8084978617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8089175921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8918150 + ... + 8919056.

It is an arithmetic number, because the mean of its divisors is an integer number (514713420).

Almost surely, 2^8089172921 is an apocalyptic number.

It is an amenable number.

8089172921 is a deficient number, since it is larger than the sum of its proper divisors (146241799).

8089172921 is a wasteful number, since it uses less digits than its factorization.

8089172921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1624.

The product of its (nonzero) digits is 145152, while the sum is 47.

The square root of 8089172921 is about 89939.8294472477. The cubic root of 8089172921 is about 2007.4036360184.

The spelling of 8089172921 in words is "eight billion, eighty-nine million, one hundred seventy-two thousand, nine hundred twenty-one".