68675221 has 2 divisors, whose sum is σ = 68675222. Its totient is φ = 68675220.

The previous prime is 68675209. The next prime is 68675237. The reversal of 68675221 is 12257686.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56460196 + 12215025 = 7514^2 + 3495^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68675221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68675251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34337610 + 34337611.

It is an arithmetic number, because the mean of its divisors is an integer number (34337611).

Almost surely, 2^68675221 is an apocalyptic number.

It is an amenable number.

68675221 is a deficient number, since it is larger than the sum of its proper divisors (1).

68675221 is an equidigital number, since it uses as much as digits as its factorization.

68675221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 37.

The square root of 68675221 is about 8287.0514056569. The cubic root of 68675221 is about 409.5120528704.

The spelling of 68675221 in words is "sixty-eight million, six hundred seventy-five thousand, two hundred twenty-one".