159172859 has 4 divisors (see below), whose sum is σ = 159309960. Its totient is φ = 159035760.

The previous prime is 159172831. The next prime is 159172873. The reversal of 159172859 is 958271951.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 159172859 - 2⁸ = 159172603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159172889) 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 3 ways as a sum of consecutive naturals, for example, 66794 + ... + 69135.

It is an arithmetic number, because the mean of its divisors is an integer number (39827490).

Almost surely, 2^159172859 is an apocalyptic number.

159172859 is a deficient number, since it is larger than the sum of its proper divisors (137101).

159172859 is a wasteful number, since it uses less digits than its factorization.

159172859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137100.

The product of its digits is 226800, while the sum is 47.

The square root of 159172859 is about 12616.3726561956. The cubic root of 159172859 is about 541.9464040629.

The spelling of 159172859 in words is "one hundred fifty-nine million, one hundred seventy-two thousand, eight hundred fifty-nine".