864959 has 2 divisors, whose sum is σ = 864960. Its totient is φ = 864958.

The previous prime is 864953. The next prime is 864967. The reversal of 864959 is 959468.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-864959 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 864959.

It is not a weakly prime, because it can be changed into another prime (864953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432479 + 432480.

It is an arithmetic number, because the mean of its divisors is an integer number (432480).

2⁸⁶⁴⁹⁵⁹ is an apocalyptic number.

864959 is a deficient number, since it is larger than the sum of its proper divisors (1).

864959 is an equidigital number, since it uses as much as digits as its factorization.

864959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The square root of 864959 is about 930.0317198892. The cubic root of 864959 is about 95.2792889218.

The spelling of 864959 in words is "eight hundred sixty-four thousand, nine hundred fifty-nine".