1191885159 has 8 divisors (see below), whose sum is σ = 1592341632. Its totient is φ = 793009400.

The previous prime is 1191885157. The next prime is 1191885187. The reversal of 1191885159 is 9515881911.

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 1191885159 - 2¹ = 1191885157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191885151) 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, 393417 + ... + 396434.

It is an arithmetic number, because the mean of its divisors is an integer number (199042704).

Almost surely, 2^1191885159 is an apocalyptic number.

1191885159 is a deficient number, since it is larger than the sum of its proper divisors (400456473).

1191885159 is an equidigital number, since it uses as much as digits as its factorization.

1191885159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790357.

The product of its digits is 129600, while the sum is 48.

The square root of 1191885159 is about 34523.6898230766. The cubic root of 1191885159 is about 1060.2577867744.

The spelling of 1191885159 in words is "one billion, one hundred ninety-one million, eight hundred eighty-five thousand, one hundred fifty-nine".