159791663 has 2 divisors, whose sum is σ = 159791664. Its totient is φ = 159791662.

The previous prime is 159791659. The next prime is 159791669. The reversal of 159791663 is 366197951.

It is a happy number.

159791663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 159791663 - 2² = 159791659 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159791669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79895831 + 79895832.

It is an arithmetic number, because the mean of its divisors is an integer number (79895832).

Almost surely, 2^159791663 is an apocalyptic number.

159791663 is a deficient number, since it is larger than the sum of its proper divisors (1).

159791663 is an equidigital number, since it uses as much as digits as its factorization.

159791663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 306180, while the sum is 47.

The square root of 159791663 is about 12640.8727151253. The cubic root of 159791663 is about 542.6477902966.

The spelling of 159791663 in words is "one hundred fifty-nine million, seven hundred ninety-one thousand, six hundred sixty-three".