68643173 has 4 divisors (see below), whose sum is σ = 68732748. Its totient is φ = 68553600.

The previous prime is 68643167. The next prime is 68643221. The reversal of 68643173 is 37134686.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37134686 = 2 ⋅18567343.

It can be written as a sum of positive squares in 2 ways, for example, as 2024929 + 66618244 = 1423^2 + 8162^2 .

It is a cyclic number.

It is not a de Polignac number, because 68643173 - 2¹⁰ = 68642149 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 (68643163) 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, 43628 + ... + 45173.

It is an arithmetic number, because the mean of its divisors is an integer number (17183187).

Almost surely, 2^68643173 is an apocalyptic number.

It is an amenable number.

68643173 is a deficient number, since it is larger than the sum of its proper divisors (89575).

68643173 is an equidigital number, since it uses as much as digits as its factorization.

68643173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89574.

The product of its digits is 72576, while the sum is 38.

The square root of 68643173 is about 8285.1175610247. The cubic root of 68643173 is about 409.4483419515.

The spelling of 68643173 in words is "sixty-eight million, six hundred forty-three thousand, one hundred seventy-three".