8789409 has 6 divisors (see below), whose sum is σ = 12695826. Its totient is φ = 5859600.

The previous prime is 8789401. The next prime is 8789411. The reversal of 8789409 is 9049878.

It can be written as a sum of positive squares in only one way, i.e., 8573184 + 216225 = 2928^2 + 465^2 .

It is not a de Polignac number, because 8789409 - 2³ = 8789401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8789401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 488292 + ... + 488309.

It is an arithmetic number, because the mean of its divisors is an integer number (2115971).

Almost surely, 2^8789409 is an apocalyptic number.

It is an amenable number.

8789409 is a deficient number, since it is larger than the sum of its proper divisors (3906417).

8789409 is a wasteful number, since it uses less digits than its factorization.

8789409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976607 (or 976604 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 8789409 is about 2964.6937447231. The cubic root of 8789409 is about 206.3731650032.

The spelling of 8789409 in words is "eight million, seven hundred eighty-nine thousand, four hundred nine".