8705409 has 8 divisors (see below), whose sum is σ = 11826432. Its totient is φ = 5694000.

The previous prime is 8705399. The next prime is 8705419. The reversal of 8705409 is 9045078.

It is an interprime number because it is at equal distance from previous prime (8705399) and next prime (8705419).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8705409 - 2⁹ = 8704897 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8705409.

It is not an unprimeable number, because it can be changed into a prime (8705419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27217 + ... + 27534.

It is an arithmetic number, because the mean of its divisors is an integer number (1478304).

Almost surely, 2^8705409 is an apocalyptic number.

It is an amenable number.

8705409 is a deficient number, since it is larger than the sum of its proper divisors (3121023).

8705409 is a wasteful number, since it uses less digits than its factorization.

8705409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54807.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 8705409 is about 2950.4930096511. The cubic root of 8705409 is about 205.7136263344.

The spelling of 8705409 in words is "eight million, seven hundred five thousand, four hundred nine".