872604909 has 12 divisors (see below), whose sum is σ = 1375013952. Its totient is φ = 528851400.

The previous prime is 872604881. The next prime is 872604913. The reversal of 872604909 is 909406278.

It is a happy number.

It is not a de Polignac number, because 872604909 - 2¹⁷ = 872473837 is a prime.

It is a super-2 number, since 2×872604909² = 1522878654421796562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872602909) 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, 4406997 + ... + 4407194.

It is an arithmetic number, because the mean of its divisors is an integer number (114584496).

Almost surely, 2^872604909 is an apocalyptic number.

It is an amenable number.

872604909 is a deficient number, since it is larger than the sum of its proper divisors (502409043).

872604909 is a wasteful number, since it uses less digits than its factorization.

872604909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8814208 (or 8814205 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 872604909 is about 29539.8867465669. The cubic root of 872604909 is about 955.5920997687.

It can be divided in two parts, 87 and 2604909, that added together give a square (2604996 = 1614²).

The spelling of 872604909 in words is "eight hundred seventy-two million, six hundred four thousand, nine hundred nine".