159393891 has 16 divisors (see below), whose sum is σ = 218874528. Its totient is φ = 103104000.

The previous prime is 159393877. The next prime is 159393901. The reversal of 159393891 is 198393951.

It is not a de Polignac number, because 159393891 - 2⁶ = 159393827 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 159393891.

It is not an unprimeable number, because it can be changed into a prime (159393811) 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, 42721 + ... + 46301.

It is an arithmetic number, because the mean of its divisors is an integer number (13679658).

Almost surely, 2^159393891 is an apocalyptic number.

159393891 is a deficient number, since it is larger than the sum of its proper divisors (59480637).

159393891 is a wasteful number, since it uses less digits than its factorization.

159393891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4022.

The product of its digits is 262440, while the sum is 48.

The square root of 159393891 is about 12625.1293458721. The cubic root of 159393891 is about 542.1971421479.

The spelling of 159393891 in words is "one hundred fifty-nine million, three hundred ninety-three thousand, eight hundred ninety-one".