159873961 has 8 divisors (see below), whose sum is σ = 181233920. Its totient is φ = 139808592.

The previous prime is 159873919. The next prime is 159873977. The reversal of 159873961 is 169378951.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 159873961 - 2⁹ = 159873449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159873991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323385 + ... + 323878.

It is an arithmetic number, because the mean of its divisors is an integer number (22654240).

Almost surely, 2^159873961 is an apocalyptic number.

It is an amenable number.

159873961 is a deficient number, since it is larger than the sum of its proper divisors (21359959).

159873961 is a wasteful number, since it uses less digits than its factorization.

159873961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647295.

The product of its digits is 408240, while the sum is 49.

The square root of 159873961 is about 12644.1275302015. The cubic root of 159873961 is about 542.7409348372.

The spelling of 159873961 in words is "one hundred fifty-nine million, eight hundred seventy-three thousand, nine hundred sixty-one".