8999001 has 24 divisors (see below), whose sum is σ = 15017184. Its totient is φ = 5132160.

The previous prime is 8998991. The next prime is 8999009. The reversal of 8999001 is 1009998.

It is not a de Polignac number, because 8999001 - 2⁹ = 8998489 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (8999009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 991 + ... + 4356.

It is an arithmetic number, because the mean of its divisors is an integer number (625716).

Almost surely, 2^8999001 is an apocalyptic number.

It is an amenable number.

8999001 is a deficient number, since it is larger than the sum of its proper divisors (6018183).

8999001 is a wasteful number, since it uses less digits than its factorization.

8999001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5381 (or 5378 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 8999001 is about 2999.8334953794. The cubic root of 8999001 is about 208.0006857103. Note that the first 3 decimals are identical.

The spelling of 8999001 in words is "eight million, nine hundred ninety-nine thousand, one".