864613 has 2 divisors, whose sum is σ = 864614. Its totient is φ = 864612.

The previous prime is 864587. The next prime is 864623. The reversal of 864613 is 316468.

864613 = 657² + 658².

864613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 432964 + 431649 = 658^2 + 657^2 .

It is a cyclic number.

It is not a de Polignac number, because 864613 - 2⁵ = 864581 is a prime.

864613 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (864623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432306 + 432307.

It is an arithmetic number, because the mean of its divisors is an integer number (432307).

2⁸⁶⁴⁶¹³ is an apocalyptic number.

864613 is the 658-th centered square number.

It is an amenable number.

864613 is a deficient number, since it is larger than the sum of its proper divisors (1).

864613 is an equidigital number, since it uses as much as digits as its factorization.

864613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 28.

The square root of 864613 is about 929.8456861222. The cubic root of 864613 is about 95.2665827201.

The spelling of 864613 in words is "eight hundred sixty-four thousand, six hundred thirteen".