159009865 has 8 divisors (see below), whose sum is σ = 218070720. Its totient is φ = 109035312.

The previous prime is 159009863. The next prime is 159009889. The reversal of 159009865 is 568900951.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 159009865 - 2¹ = 159009863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (159009863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2271535 + ... + 2271604.

It is an arithmetic number, because the mean of its divisors is an integer number (27258840).

Almost surely, 2^159009865 is an apocalyptic number.

It is an amenable number.

159009865 is a deficient number, since it is larger than the sum of its proper divisors (59060855).

159009865 is an equidigital number, since it uses as much as digits as its factorization.

159009865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4543151.

The product of its (nonzero) digits is 97200, while the sum is 43.

The square root of 159009865 is about 12609.9113795459. The cubic root of 159009865 is about 541.7613553860.

The spelling of 159009865 in words is "one hundred fifty-nine million, nine thousand, eight hundred sixty-five".