159806999 has 12 divisors (see below), whose sum is σ = 175978152. Its totient is φ = 145012560.

The previous prime is 159806989. The next prime is 159807029. The reversal of 159806999 is 999608951.

159806999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-159806999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159806989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99269 + ... + 100865.

It is an arithmetic number, because the mean of its divisors is an integer number (14664846).

Almost surely, 2^159806999 is an apocalyptic number.

159806999 is a deficient number, since it is larger than the sum of its proper divisors (16171153).

159806999 is a wasteful number, since it uses less digits than its factorization.

159806999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2446 (or 2435 counting only the distinct ones).

The product of its (nonzero) digits is 1574640, while the sum is 56.

The square root of 159806999 is about 12641.4793042587. The cubic root of 159806999 is about 542.6651499430.

The spelling of 159806999 in words is "one hundred fifty-nine million, eight hundred six thousand, nine hundred ninety-nine".