159643667 has 16 divisors (see below), whose sum is σ = 169720320. Its totient is φ = 149859072.

The previous prime is 159643663. The next prime is 159643691. The reversal of 159643667 is 766346951.

It is a cyclic number.

It is not a de Polignac number, because 159643667 - 2² = 159643663 is a prime.

It is a super-2 number, since 2×159643667² = 50972200826413778, which contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159643663) 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 15 ways as a sum of consecutive naturals, for example, 363434 + ... + 363872.

It is an arithmetic number, because the mean of its divisors is an integer number (10607520).

Almost surely, 2^159643667 is an apocalyptic number.

159643667 is a deficient number, since it is larger than the sum of its proper divisors (10076653).

159643667 is a wasteful number, since it uses less digits than its factorization.

159643667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722.

The product of its digits is 816480, while the sum is 47.

The square root of 159643667 is about 12635.0174910841. The cubic root of 159643667 is about 542.4802085271.

The spelling of 159643667 in words is "one hundred fifty-nine million, six hundred forty-three thousand, six hundred sixty-seven".