868489 has 2 divisors, whose sum is σ = 868490. Its totient is φ = 868488.

The previous prime is 868487. The next prime is 868493. The reversal of 868489 is 984868.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 783225 + 85264 = 885^2 + 292^2 .

It is a cyclic number.

It is not a de Polignac number, because 868489 - 2¹ = 868487 is a prime.

Together with 868487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (868487) 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, 434244 + 434245.

It is an arithmetic number, because the mean of its divisors is an integer number (434245).

2⁸⁶⁸⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

868489 is a deficient number, since it is larger than the sum of its proper divisors (1).

868489 is an equidigital number, since it uses as much as digits as its factorization.

868489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110592, while the sum is 43.

The square root of 868489 is about 931.9275722930. The cubic root of 868489 is about 95.4087283451.

The spelling of 868489 in words is "eight hundred sixty-eight thousand, four hundred eighty-nine".