864617 has 4 divisors (see below), whose sum is σ = 931140. Its totient is φ = 798096.

The previous prime is 864613. The next prime is 864623. The reversal of 864617 is 716468.

864617 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 434281 + 430336 = 659^2 + 656^2 .

It is not a de Polignac number, because 864617 - 2² = 864613 is a prime.

It is a Duffinian 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, 33242 + ... + 33267.

It is an arithmetic number, because the mean of its divisors is an integer number (232785).

2⁸⁶⁴⁶¹⁷ is an apocalyptic number.

It is an amenable number.

864617 is a deficient number, since it is larger than the sum of its proper divisors (66523).

864617 is a wasteful number, since it uses less digits than its factorization.

864617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66522.

The product of its digits is 8064, while the sum is 32.

The square root of 864617 is about 929.8478370142. The cubic root of 864617 is about 95.2667296320.

It can be divided in two parts, 86461 and 7, that added together give a palindrome (86468).

The spelling of 864617 in words is "eight hundred sixty-four thousand, six hundred seventeen".