864289 has 2 divisors, whose sum is σ = 864290. Its totient is φ = 864288.

The previous prime is 864277. The next prime is 864299. The reversal of 864289 is 982468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 810000 + 54289 = 900^2 + 233^2 .

It is a cyclic number.

It is not a de Polignac number, because 864289 - 2¹¹ = 862241 is a prime.

It is not a weakly prime, because it can be changed into another prime (864299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432144 + 432145.

It is an arithmetic number, because the mean of its divisors is an integer number (432145).

2⁸⁶⁴²⁸⁹ is an apocalyptic number.

It is an amenable number.

864289 is a deficient number, since it is larger than the sum of its proper divisors (1).

864289 is an equidigital number, since it uses as much as digits as its factorization.

864289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 37.

The square root of 864289 is about 929.6714473404. The cubic root of 864289 is about 95.2546813534.

The spelling of 864289 in words is "eight hundred sixty-four thousand, two hundred eighty-nine".