159967809 has 12 divisors (see below), whose sum is σ = 233849616. Its totient is φ = 105359832.

The previous prime is 159967763. The next prime is 159967813. The reversal of 159967809 is 908769951.

It is not a de Polignac number, because 159967809 - 2¹⁶ = 159902273 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (159967849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106327 + ... + 107820.

It is an arithmetic number, because the mean of its divisors is an integer number (19487468).

Almost surely, 2^159967809 is an apocalyptic number.

It is an amenable number.

159967809 is a deficient number, since it is larger than the sum of its proper divisors (73881807).

159967809 is a wasteful number, since it uses less digits than its factorization.

159967809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214236 (or 214233 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 54.

The square root of 159967809 is about 12647.8381156623. The cubic root of 159967809 is about 542.8471126197.

The spelling of 159967809 in words is "one hundred fifty-nine million, nine hundred sixty-seven thousand, eight hundred nine".