8609428409 has 4 divisors (see below), whose sum is σ = 9062556240. Its totient is φ = 8156300580.

The previous prime is 8609428357. The next prime is 8609428417. The reversal of 8609428409 is 9048249068.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8609428409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8609428459) 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, 226563887 + ... + 226563924.

It is an arithmetic number, because the mean of its divisors is an integer number (2265639060).

Almost surely, 2^8609428409 is an apocalyptic number.

It is an amenable number.

8609428409 is a deficient number, since it is larger than the sum of its proper divisors (453127831).

8609428409 is a wasteful number, since it uses less digits than its factorization.

8609428409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453127830.

The product of its (nonzero) digits is 995328, while the sum is 50.

The square root of 8609428409 is about 92787.0056042332. The cubic root of 8609428409 is about 2049.5480589292.

The spelling of 8609428409 in words is "eight billion, six hundred nine million, four hundred twenty-eight thousand, four hundred nine".