864319 has 2 divisors, whose sum is σ = 864320. Its totient is φ = 864318.

The previous prime is 864307. The next prime is 864323. The reversal of 864319 is 913468.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 864319 - 2⁷ = 864191 is a prime.

It is a super-2 number, since 2×864319² = 1494094667522, which contains 22 as substring.

864319 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (864359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432159 + 432160.

It is an arithmetic number, because the mean of its divisors is an integer number (432160).

2⁸⁶⁴³¹⁹ is an apocalyptic number.

864319 is a deficient number, since it is larger than the sum of its proper divisors (1).

864319 is an equidigital number, since it uses as much as digits as its factorization.

864319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The square root of 864319 is about 929.6875819328. The cubic root of 864319 is about 95.2557834567.

The spelling of 864319 in words is "eight hundred sixty-four thousand, three hundred nineteen".