159191 has 2 divisors, whose sum is σ = 159192. Its totient is φ = 159190.

The previous prime is 159179. The next prime is 159193. The reversal of 159191 is 191951.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159191 is a prime.

Together with 159193, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 159191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79595 + 79596.

It is an arithmetic number, because the mean of its divisors is an integer number (79596).

2¹⁵⁹¹⁹¹ is an apocalyptic number.

159191 is a deficient number, since it is larger than the sum of its proper divisors (1).

159191 is an equidigital number, since it uses as much as digits as its factorization.

159191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 405, while the sum is 26.

The square root of 159191 is about 398.9874684749. The cubic root of 159191 is about 54.1966991903.

The spelling of 159191 in words is "one hundred fifty-nine thousand, one hundred ninety-one".