159891089 has 6 divisors (see below), whose sum is σ = 162967686. Its totient is φ = 156871520.

The previous prime is 159891073. The next prime is 159891107. The reversal of 159891089 is 980198951.

It can be written as a sum of positive squares in 3 ways, for example, as 92929600 + 66961489 = 9640^2 + 8183^2 .

It is not a de Polignac number, because 159891089 - 2⁴ = 159891073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (159891019) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25652 + ... + 31269.

It is an arithmetic number, because the mean of its divisors is an integer number (27161281).

Almost surely, 2^159891089 is an apocalyptic number.

It is an amenable number.

159891089 is a deficient number, since it is larger than the sum of its proper divisors (3076597).

159891089 is an frugal number, since it uses more digits than its factorization.

159891089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57027 (or 56974 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 50.

The square root of 159891089 is about 12644.8048225348. The cubic root of 159891089 is about 542.7603162189.

The spelling of 159891089 in words is "one hundred fifty-nine million, eight hundred ninety-one thousand, eighty-nine".