864309 has 8 divisors (see below), whose sum is σ = 1171552. Its totient is φ = 566640.

The previous prime is 864307. The next prime is 864319. The reversal of 864309 is 903468.

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

It is not a de Polignac number, because 864309 - 2¹ = 864307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864301) 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, 2179 + ... + 2544.

It is an arithmetic number, because the mean of its divisors is an integer number (146444).

2⁸⁶⁴³⁰⁹ is an apocalyptic number.

It is an amenable number.

864309 is a deficient number, since it is larger than the sum of its proper divisors (307243).

864309 is a wasteful number, since it uses less digits than its factorization.

864309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4787.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 864309 is about 929.6822037664. The cubic root of 864309 is about 95.2554160917.

The spelling of 864309 in words is "eight hundred sixty-four thousand, three hundred nine".