159647791 has 2 divisors, whose sum is σ = 159647792. Its totient is φ = 159647790.

The previous prime is 159647753. The next prime is 159647821. The reversal of 159647791 is 197746951.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 159647791 - 2¹¹ = 159645743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159647591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79823895 + 79823896.

It is an arithmetic number, because the mean of its divisors is an integer number (79823896).

Almost surely, 2^159647791 is an apocalyptic number.

159647791 is a deficient number, since it is larger than the sum of its proper divisors (1).

159647791 is an equidigital number, since it uses as much as digits as its factorization.

159647791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 49.

The square root of 159647791 is about 12635.1806872716. The cubic root of 159647791 is about 542.4848796992.

The spelling of 159647791 in words is "one hundred fifty-nine million, six hundred forty-seven thousand, seven hundred ninety-one".