864653 has 4 divisors (see below), whose sum is σ = 888060. Its totient is φ = 841248.

The previous prime is 864641. The next prime is 864673. The reversal of 864653 is 356468.

864653 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 438244 + 426409 = 662^2 + 653^2 .

It is a cyclic number.

It is not a de Polignac number, because 864653 - 2¹⁴ = 848269 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11648 + ... + 11721.

It is an arithmetic number, because the mean of its divisors is an integer number (222015).

2⁸⁶⁴⁶⁵³ is an apocalyptic number.

It is an amenable number.

864653 is a deficient number, since it is larger than the sum of its proper divisors (23407).

864653 is a wasteful number, since it uses less digits than its factorization.

864653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23406.

The product of its digits is 17280, while the sum is 32.

The square root of 864653 is about 929.8671948187. The cubic root of 864653 is about 95.2680518184.

It can be divided in two parts, 86465 and 3, that added together give a palindrome (86468).

The spelling of 864653 in words is "eight hundred sixty-four thousand, six hundred fifty-three".