159607921 has 16 divisors (see below), whose sum is σ = 179262720. Its totient is φ = 140872720.

The previous prime is 159607907. The next prime is 159607939. The reversal of 159607921 is 129706951.

It is a cyclic number.

It is not a de Polignac number, because 159607921 - 2¹⁹ = 159083633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159607901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52386 + ... + 55348.

It is an arithmetic number, because the mean of its divisors is an integer number (11203920).

Almost surely, 2^159607921 is an apocalyptic number.

159607921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

159607921 is a deficient number, since it is larger than the sum of its proper divisors (19654799).

159607921 is a wasteful number, since it uses less digits than its factorization.

159607921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3116.

The product of its (nonzero) digits is 34020, while the sum is 40.

The square root of 159607921 is about 12633.6028511268. The cubic root of 159607921 is about 542.4397163790.

The spelling of 159607921 in words is "one hundred fifty-nine million, six hundred seven thousand, nine hundred twenty-one".