191000159 has 8 divisors (see below), whose sum is σ = 218500128. Its totient is φ = 163553760.

The previous prime is 191000149. The next prime is 191000189. The reversal of 191000159 is 951000191.

It is a happy number.

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 191000159 - 2⁴ = 191000143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191000129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5432 + ... + 20285.

It is an arithmetic number, because the mean of its divisors is an integer number (27312516).

Almost surely, 2^191000159 is an apocalyptic number.

191000159 is a deficient number, since it is larger than the sum of its proper divisors (27499969).

191000159 is a wasteful number, since it uses less digits than its factorization.

191000159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26785.

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

The square root of 191000159 is about 13820.2807135022. The cubic root of 191000159 is about 575.8966818529.

The spelling of 191000159 in words is "one hundred ninety-one million, one hundred fifty-nine", and thus it is an aban number.