868249 has 2 divisors, whose sum is σ = 868250. Its totient is φ = 868248.

The previous prime is 868229. The next prime is 868267. The reversal of 868249 is 942868.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 585225 + 283024 = 765^2 + 532^2 .

It is a cyclic number.

It is not a de Polignac number, because 868249 - 2⁷ = 868121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (868229) 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, 434124 + 434125.

It is an arithmetic number, because the mean of its divisors is an integer number (434125).

2⁸⁶⁸²⁴⁹ is an apocalyptic number.

It is an amenable number.

868249 is a deficient number, since it is larger than the sum of its proper divisors (1).

868249 is an equidigital number, since it uses as much as digits as its factorization.

868249 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 868249 is about 931.7987980246. The cubic root of 868249 is about 95.3999390553.

The spelling of 868249 in words is "eight hundred sixty-eight thousand, two hundred forty-nine".