864393 has 8 divisors (see below), whose sum is σ = 1168608. Its totient is φ = 568224.

The previous prime is 864379. The next prime is 864407. The reversal of 864393 is 393468.

It is an interprime number because it is at equal distance from previous prime (864379) and next prime (864407).

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

It is not a de Polignac number, because 864393 - 2⁵ = 864361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (864323) 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, 1755 + ... + 2192.

It is an arithmetic number, because the mean of its divisors is an integer number (146076).

2⁸⁶⁴³⁹³ is an apocalyptic number.

It is an amenable number.

864393 is a deficient number, since it is larger than the sum of its proper divisors (304215).

864393 is a wasteful number, since it uses less digits than its factorization.

864393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4023.

The product of its digits is 15552, while the sum is 33.

The square root of 864393 is about 929.7273793968. The cubic root of 864393 is about 95.2585018692.

The spelling of 864393 in words is "eight hundred sixty-four thousand, three hundred ninety-three".