159120173 has 4 divisors (see below), whose sum is σ = 159426108. Its totient is φ = 158814240.

The previous prime is 159120149. The next prime is 159120191. The reversal of 159120173 is 371021951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 371021951 = 8221 ⋅45131.

It can be written as a sum of positive squares in 2 ways, for example, as 25532809 + 133587364 = 5053^2 + 11558^2 .

It is a cyclic number.

It is not a de Polignac number, because 159120173 - 2¹² = 159116077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159120103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152186 + ... + 153227.

It is an arithmetic number, because the mean of its divisors is an integer number (39856527).

Almost surely, 2^159120173 is an apocalyptic number.

It is an amenable number.

159120173 is a deficient number, since it is larger than the sum of its proper divisors (305935).

159120173 is an equidigital number, since it uses as much as digits as its factorization.

159120173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305934.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 159120173 is about 12614.2844822844. The cubic root of 159120173 is about 541.8866029567.

The spelling of 159120173 in words is "one hundred fifty-nine million, one hundred twenty thousand, one hundred seventy-three".