159691065 has 16 divisors (see below), whose sum is σ = 255830400. Its totient is φ = 85060352.

The previous prime is 159691061. The next prime is 159691073. The reversal of 159691065 is 560196951.

It is a cyclic number.

It is not a de Polignac number, because 159691065 - 2² = 159691061 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (159691061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6241 + ... + 18929.

It is an arithmetic number, because the mean of its divisors is an integer number (15989400).

Almost surely, 2^159691065 is an apocalyptic number.

159691065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

159691065 is a deficient number, since it is larger than the sum of its proper divisors (96139335).

159691065 is a wasteful number, since it uses less digits than its factorization.

159691065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13536.

The product of its (nonzero) digits is 72900, while the sum is 42.

The square root of 159691065 is about 12636.8930121292. The cubic root of 159691065 is about 542.5338904409.

The spelling of 159691065 in words is "one hundred fifty-nine million, six hundred ninety-one thousand, sixty-five".