9999159 has 4 divisors (see below), whose sum is σ = 13332216. Its totient is φ = 6666104.

The previous prime is 9999083. The next prime is 9999161. The reversal of 9999159 is 9519999.

9999159 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 9999159 - 2⁸ = 9998903 is a prime.

It is an Ulam number.

9999159 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999659) 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, 1666524 + ... + 1666529.

It is an arithmetic number, because the mean of its divisors is an integer number (3333054).

Almost surely, 2^9999159 is an apocalyptic number.

9999159 is a deficient number, since it is larger than the sum of its proper divisors (3333057).

9999159 is a wasteful number, since it uses less digits than its factorization.

9999159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3333056.

The product of its digits is 295245, while the sum is 51.

The square root of 9999159 is about 3162.1446835969. The cubic root of 9999159 is about 215.4374292353.

The spelling of 9999159 in words is "nine million, nine hundred ninety-nine thousand, one hundred fifty-nine".