159691959 has 32 divisors (see below), whose sum is σ = 272547840. Its totient is φ = 90520416.

The previous prime is 159691949. The next prime is 159691991. The reversal of 159691959 is 959196951.

159691959 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 159691959 - 2¹¹ = 159689911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159691919) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20677 + ... + 27329.

It is an arithmetic number, because the mean of its divisors is an integer number (8517120).

Almost surely, 2^159691959 is an apocalyptic number.

159691959 is a deficient number, since it is larger than the sum of its proper divisors (112855881).

159691959 is a wasteful number, since it uses less digits than its factorization.

159691959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6796 (or 6790 counting only the distinct ones).

The product of its digits is 984150, while the sum is 54.

The square root of 159691959 is about 12636.9283846986. The cubic root of 159691959 is about 542.5349028632.

The spelling of 159691959 in words is "one hundred fifty-nine million, six hundred ninety-one thousand, nine hundred fifty-nine".