159243169 has 4 divisors (see below), whose sum is σ = 159268420. Its totient is φ = 159217920.

The previous prime is 159243167. The next prime is 159243173. The reversal of 159243169 is 961342951.

159243169 = T₁₀₃₀₂ + T₁₀₃₀₃ + T₁₀₃₀₄.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 36144144 + 123099025 = 6012^2 + 11095^2 .

It is a cyclic number.

It is not a de Polignac number, because 159243169 - 2¹ = 159243167 is a prime.

It is a super-2 number, since 2×159243169² = 50716773746325122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159243167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5737 + ... + 18745.

It is an arithmetic number, because the mean of its divisors is an integer number (39817105).

Almost surely, 2^159243169 is an apocalyptic number.

159243169 is the 10304-th centered triangular number.

It is an amenable number.

159243169 is a deficient number, since it is larger than the sum of its proper divisors (25251).

159243169 is a wasteful number, since it uses less digits than its factorization.

159243169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25250.

The product of its digits is 58320, while the sum is 40.

The square root of 159243169 is about 12619.1588071472. The cubic root of 159243169 is about 542.0261886920.

The spelling of 159243169 in words is "one hundred fifty-nine million, two hundred forty-three thousand, one hundred sixty-nine".