8972509 has 16 divisors (see below), whose sum is σ = 11304832. Its totient is φ = 6931008.

The previous prime is 8972501. The next prime is 8972567. The reversal of 8972509 is 9052798.

8972509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8972509 - 2³ = 8972501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8972501) 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, 2767 + ... + 5059.

It is an arithmetic number, because the mean of its divisors is an integer number (706552).

Almost surely, 2^8972509 is an apocalyptic number.

It is an amenable number.

8972509 is a deficient number, since it is larger than the sum of its proper divisors (2332323).

8972509 is a wasteful number, since it uses less digits than its factorization.

8972509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2356.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 8972509 is about 2995.4146624466. The cubic root of 8972509 is about 207.7963752427.

The spelling of 8972509 in words is "eight million, nine hundred seventy-two thousand, five hundred nine".