159929857 has 4 divisors (see below), whose sum is σ = 163649200. Its totient is φ = 156210516.

The previous prime is 159929831. The next prime is 159929881. The reversal of 159929857 is 758929951.

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 a de Polignac number, because none of the positive numbers 2^k-159929857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 159929798 and 159929807.

It is not an unprimeable number, because it can be changed into a prime (159929657) 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, 1859607 + ... + 1859692.

It is an arithmetic number, because the mean of its divisors is an integer number (40912300).

Almost surely, 2^159929857 is an apocalyptic number.

It is an amenable number.

159929857 is a deficient number, since it is larger than the sum of its proper divisors (3719343).

159929857 is an equidigital number, since it uses as much as digits as its factorization.

159929857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3719342.

The product of its digits is 2041200, while the sum is 55.

The square root of 159929857 is about 12646.3376912053. The cubic root of 159929857 is about 542.8041794754.

The spelling of 159929857 in words is "one hundred fifty-nine million, nine hundred twenty-nine thousand, eight hundred fifty-seven".