68821306 has 16 divisors (see below), whose sum is σ = 109791360. Its totient is φ = 32261760.

The previous prime is 68821289. The next prime is 68821309. The reversal of 68821306 is 60312886.

It is not an unprimeable number, because it can be changed into a prime (68821309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5650 + ... + 13021.

It is an arithmetic number, because the mean of its divisors is an integer number (6861960).

Almost surely, 2^68821306 is an apocalyptic number.

68821306 is a deficient number, since it is larger than the sum of its proper divisors (40970054).

68821306 is a wasteful number, since it uses less digits than its factorization.

68821306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18789.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 68821306 is about 8295.8607751095. The cubic root of 68821306 is about 409.8022167208.

The spelling of 68821306 in words is "sixty-eight million, eight hundred twenty-one thousand, three hundred six".