73159145 has 4 divisors (see below), whose sum is σ = 87790980. Its totient is φ = 58527312.

The previous prime is 73159117. The next prime is 73159147. The reversal of 73159145 is 54195137.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50993881 + 22165264 = 7141^2 + 4708^2 .

It is a cyclic number.

It is not a de Polignac number, because 73159145 - 2²⁰ = 72110569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (73159147) 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 3 ways as a sum of consecutive naturals, for example, 7315910 + ... + 7315919.

It is an arithmetic number, because the mean of its divisors is an integer number (21947745).

Almost surely, 2^73159145 is an apocalyptic number.

It is an amenable number.

73159145 is a deficient number, since it is larger than the sum of its proper divisors (14631835).

73159145 is a wasteful number, since it uses less digits than its factorization.

73159145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14631834.

The product of its digits is 18900, while the sum is 35.

The square root of 73159145 is about 8553.3119316438. The cubic root of 73159145 is about 418.2374073936.

The spelling of 73159145 in words is "seventy-three million, one hundred fifty-nine thousand, one hundred forty-five".