864039 has 8 divisors (see below), whose sum is σ = 1256832. Its totient is φ = 523640.

The previous prime is 864037. The next prime is 864047. The reversal of 864039 is 930468.

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

It is a cyclic number.

It is not a de Polignac number, because 864039 - 2¹ = 864037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 863997 and 864015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864037) 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, 13059 + ... + 13124.

It is an arithmetic number, because the mean of its divisors is an integer number (157104).

2⁸⁶⁴⁰³⁹ is an apocalyptic number.

864039 is a deficient number, since it is larger than the sum of its proper divisors (392793).

864039 is a wasteful number, since it uses less digits than its factorization.

864039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26197.

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

The square root of 864039 is about 929.5369815128. The cubic root of 864039 is about 95.2454961669.

The spelling of 864039 in words is "eight hundred sixty-four thousand, thirty-nine".