842744663 has 2 divisors, whose sum is σ = 842744664. Its totient is φ = 842744662.

The previous prime is 842744569. The next prime is 842744687. The reversal of 842744663 is 366447248.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-842744663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (842744963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421372331 + 421372332.

It is an arithmetic number, because the mean of its divisors is an integer number (421372332).

Almost surely, 2^842744663 is an apocalyptic number.

842744663 is a deficient number, since it is larger than the sum of its proper divisors (1).

842744663 is an equidigital number, since it uses as much as digits as its factorization.

842744663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 44.

The square root of 842744663 is about 29030.0648121908. The cubic root of 842744663 is about 944.5653359677.

The spelling of 842744663 in words is "eight hundred forty-two million, seven hundred forty-four thousand, six hundred sixty-three".