73017145 has 4 divisors (see below), whose sum is σ = 87620580. Its totient is φ = 58413712.

The previous prime is 73017137. The next prime is 73017149. The reversal of 73017145 is 54171037.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54171037 = 73 ⋅742069.

It can be written as a sum of positive squares in 2 ways, for example, as 52113961 + 20903184 = 7219^2 + 4572^2 .

It is a cyclic number.

It is not a de Polignac number, because 73017145 - 2³ = 73017137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (73017149) 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, 7301710 + ... + 7301719.

It is an arithmetic number, because the mean of its divisors is an integer number (21905145).

Almost surely, 2^73017145 is an apocalyptic number.

It is an amenable number.

73017145 is a deficient number, since it is larger than the sum of its proper divisors (14603435).

73017145 is a wasteful number, since it uses less digits than its factorization.

73017145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14603434.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 73017145 is about 8545.0070216472. The cubic root of 73017145 is about 417.9666361503.

The spelling of 73017145 in words is "seventy-three million, seventeen thousand, one hundred forty-five".