8409345 has 24 divisors (see below), whose sum is σ = 15431616. Its totient is φ = 3830688.

The previous prime is 8409319. The next prime is 8409353. The reversal of 8409345 is 5439048.

It is not a de Polignac number, because 8409345 - 2⁶ = 8409281 is a prime.

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29574 + ... + 29856.

It is an arithmetic number, because the mean of its divisors is an integer number (642984).

Almost surely, 2^8409345 is an apocalyptic number.

It is an amenable number.

8409345 is a deficient number, since it is larger than the sum of its proper divisors (7022271).

8409345 is an equidigital number, since it uses as much as digits as its factorization.

8409345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581 (or 298 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 8409345 is about 2899.8870667666. The cubic root of 8409345 is about 203.3546261556.

The spelling of 8409345 in words is "eight million, four hundred nine thousand, three hundred forty-five".