73146173 has 4 divisors (see below), whose sum is σ = 74930268. Its totient is φ = 71362080.

The previous prime is 73146133. The next prime is 73146191. The reversal of 73146173 is 37164137.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37164137 = 127 ⋅292631.

It can be written as a sum of positive squares in 2 ways, for example, as 5938969 + 67207204 = 2437^2 + 8198^2 .

It is a cyclic number.

It is not a de Polignac number, because 73146173 - 2¹⁸ = 72884029 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 (73146113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 891986 + ... + 892067.

It is an arithmetic number, because the mean of its divisors is an integer number (18732567).

Almost surely, 2^73146173 is an apocalyptic number.

It is an amenable number.

73146173 is a deficient number, since it is larger than the sum of its proper divisors (1784095).

73146173 is a wasteful number, since it uses less digits than its factorization.

73146173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784094.

The product of its digits is 10584, while the sum is 32.

The square root of 73146173 is about 8552.5535952720. The cubic root of 73146173 is about 418.2126864179.

The spelling of 73146173 in words is "seventy-three million, one hundred forty-six thousand, one hundred seventy-three".