68600221 has 4 divisors (see below), whose sum is σ = 69371100. Its totient is φ = 67829344.

The previous prime is 68600197. The next prime is 68600227. The reversal of 68600221 is 12200686.

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 19404025 + 49196196 = 4405^2 + 7014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68600221 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 (68600227) 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, 385306 + ... + 385483.

It is an arithmetic number, because the mean of its divisors is an integer number (17342775).

Almost surely, 2^68600221 is an apocalyptic number.

It is an amenable number.

68600221 is a deficient number, since it is larger than the sum of its proper divisors (770879).

68600221 is an equidigital number, since it uses as much as digits as its factorization.

68600221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770878.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 68600221 is about 8282.5250376923. The cubic root of 68600221 is about 409.3629229466.

The spelling of 68600221 in words is "sixty-eight million, six hundred thousand, two hundred twenty-one".