868663 has 2 divisors, whose sum is σ = 868664. Its totient is φ = 868662.

The previous prime is 868639. The next prime is 868669. The reversal of 868663 is 366868.

868663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 868663 - 2⁹ = 868151 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434331 + 434332.

It is an arithmetic number, because the mean of its divisors is an integer number (434332).

2⁸⁶⁸⁶⁶³ is an apocalyptic number.

868663 is a deficient number, since it is larger than the sum of its proper divisors (1).

868663 is an equidigital number, since it uses as much as digits as its factorization.

868663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 37.

The square root of 868663 is about 932.0209225119. The cubic root of 868663 is about 95.4150995677.

The spelling of 868663 in words is "eight hundred sixty-eight thousand, six hundred sixty-three".