68173243 has 4 divisors (see below), whose sum is σ = 68194600. Its totient is φ = 68151888.

The previous prime is 68173177. The next prime is 68173271. The reversal of 68173243 is 34237186.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34237186 = 2 ⋅17118593.

It is a cyclic number.

It is not a de Polignac number, because 68173243 - 2¹⁷ = 68042171 is a prime.

It is a super-3 number, since 3×68173243³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68173199 and 68173208.

It is not an unprimeable number, because it can be changed into a prime (68173543) 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, 4818 + ... + 12631.

It is an arithmetic number, because the mean of its divisors is an integer number (17048650).

Almost surely, 2^68173243 is an apocalyptic number.

68173243 is a deficient number, since it is larger than the sum of its proper divisors (21357).

68173243 is a wasteful number, since it uses less digits than its factorization.

68173243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21356.

The product of its digits is 24192, while the sum is 34.

The square root of 68173243 is about 8256.7089690748. The cubic root of 68173243 is about 408.5118427981.

The spelling of 68173243 in words is "sixty-eight million, one hundred seventy-three thousand, two hundred forty-three".