68216273 has 4 divisors (see below), whose sum is σ = 68714340. Its totient is φ = 67718208.

The previous prime is 68216261. The next prime is 68216279. The reversal of 68216273 is 37261286.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14531344 + 53684929 = 3812^2 + 7327^2 .

It is a cyclic number.

It is not a de Polignac number, because 68216273 - 2⁶ = 68216209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68216279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248828 + ... + 249101.

It is an arithmetic number, because the mean of its divisors is an integer number (17178585).

Almost surely, 2^68216273 is an apocalyptic number.

It is an amenable number.

68216273 is a deficient number, since it is larger than the sum of its proper divisors (498067).

68216273 is a wasteful number, since it uses less digits than its factorization.

68216273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498066.

The product of its digits is 24192, while the sum is 35.

The square root of 68216273 is about 8259.3143177869. The cubic root of 68216273 is about 408.5977737134.

The spelling of 68216273 in words is "sixty-eight million, two hundred sixteen thousand, two hundred seventy-three".