159191899 has 4 divisors (see below), whose sum is σ = 167570440. Its totient is φ = 150813360.

The previous prime is 159191887. The next prime is 159191909. The reversal of 159191899 is 998191951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 998191951 = 163 ⋅6123877.

It is a cyclic number.

It is not a de Polignac number, because 159191899 - 2⁷ = 159191771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159191099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4189242 + ... + 4189279.

It is an arithmetic number, because the mean of its divisors is an integer number (41892610).

Almost surely, 2^159191899 is an apocalyptic number.

159191899 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

159191899 is a deficient number, since it is larger than the sum of its proper divisors (8378541).

159191899 is an equidigital number, since it uses as much as digits as its factorization.

159191899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8378540.

The product of its digits is 262440, while the sum is 52.

The square root of 159191899 is about 12617.1272086795. The cubic root of 159191899 is about 541.9680121189.

Adding to 159191899 its sum of digits (52), we get a palindrome (159191951).

The spelling of 159191899 in words is "one hundred fifty-nine million, one hundred ninety-one thousand, eight hundred ninety-nine".