868822663 has 2 divisors, whose sum is σ = 868822664. Its totient is φ = 868822662.

The previous prime is 868822649. The next prime is 868822667. The reversal of 868822663 is 366228868.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-868822663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868822667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434411331 + 434411332.

It is an arithmetic number, because the mean of its divisors is an integer number (434411332).

Almost surely, 2^868822663 is an apocalyptic number.

868822663 is a deficient number, since it is larger than the sum of its proper divisors (1).

868822663 is an equidigital number, since it uses as much as digits as its factorization.

868822663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1327104, while the sum is 49.

The square root of 868822663 is about 29475.7979196493. The cubic root of 868822663 is about 954.2094507499.

The spelling of 868822663 in words is "eight hundred sixty-eight million, eight hundred twenty-two thousand, six hundred sixty-three".