8999972 has 12 divisors (see below), whose sum is σ = 15864240. Its totient is φ = 4467336.

The previous prime is 8999971. The next prime is 8999981. The reversal of 8999972 is 2799998.

It is not an unprimeable number, because it can be changed into a prime (8999971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7538 + ... + 8649.

It is an arithmetic number, because the mean of its divisors is an integer number (1322020).

Almost surely, 2^8999972 is an apocalyptic number.

It is an amenable number.

8999972 is a deficient number, since it is larger than the sum of its proper divisors (6864268).

8999972 is a wasteful number, since it uses less digits than its factorization.

8999972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16330 (or 16328 counting only the distinct ones).

The product of its digits is 734832, while the sum is 53.

The square root of 8999972 is about 2999.9953333297. The cubic root of 8999972 is about 208.0081665926.

The spelling of 8999972 in words is "eight million, nine hundred ninety-nine thousand, nine hundred seventy-two".