73169945 has 8 divisors (see below), whose sum is σ = 89460936. Its totient is φ = 57431296.

The previous prime is 73169939. The next prime is 73169959. The reversal of 73169945 is 54996137.

It can be written as a sum of positive squares in 4 ways, for example, as 19044496 + 54125449 = 4364^2 + 7357^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73169945 - 2²⁰ = 72121369 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73169896 and 73169905.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 137792 + ... + 138321.

It is an arithmetic number, because the mean of its divisors is an integer number (11182617).

Almost surely, 2^73169945 is an apocalyptic number.

It is an amenable number.

73169945 is a deficient number, since it is larger than the sum of its proper divisors (16290991).

73169945 is a wasteful number, since it uses less digits than its factorization.

73169945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276171.

The product of its digits is 204120, while the sum is 44.

The square root of 73169945 is about 8553.9432427390. The cubic root of 73169945 is about 418.2579869204.

The spelling of 73169945 in words is "seventy-three million, one hundred sixty-nine thousand, nine hundred forty-five".