159942857 has 4 divisors (see below), whose sum is σ = 165102336. Its totient is φ = 154783380.

The previous prime is 159942821. The next prime is 159942877. The reversal of 159942857 is 758249951.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 159942857 - 2¹⁰ = 159941833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159942877) 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, 2579693 + ... + 2579754.

It is an arithmetic number, because the mean of its divisors is an integer number (41275584).

Almost surely, 2^159942857 is an apocalyptic number.

It is an amenable number.

159942857 is a deficient number, since it is larger than the sum of its proper divisors (5159479).

159942857 is an equidigital number, since it uses as much as digits as its factorization.

159942857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5159478.

The product of its digits is 907200, while the sum is 50.

The square root of 159942857 is about 12646.8516635564. The cubic root of 159942857 is about 542.8188864710.

The spelling of 159942857 in words is "one hundred fifty-nine million, nine hundred forty-two thousand, eight hundred fifty-seven".