159946609 has 3 divisors (see below), whose sum is σ = 159959257. Its totient is φ = 159933962.

The previous prime is 159946607. The next prime is 159946613. The reversal of 159946609 is 906649951.

The square root of 159946609 is 12647.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 906649951 = 149 ⋅6084899.

It is not a de Polignac number, because 159946609 - 2¹ = 159946607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159946601) 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 2 ways as a sum of consecutive naturals, for example, 6324 + ... + 18970.

Almost surely, 2^159946609 is an apocalyptic number.

159946609 is the 12647-th square number.

159946609 is the 6324-th centered octagonal number.

It is an amenable number.

159946609 is a deficient number, since it is larger than the sum of its proper divisors (12648).

159946609 is an frugal number, since it uses more digits than its factorization.

159946609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25294 (or 12647 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 49.

The cubic root of 159946609 is about 542.8231309881.

Multiplying 159946609 by its sum of digits (49), we get a square (7837383841 = 88529²).

The spelling of 159946609 in words is "one hundred fifty-nine million, nine hundred forty-six thousand, six hundred nine".