68220233 has 2 divisors, whose sum is σ = 68220234. Its totient is φ = 68220232.

The previous prime is 68220223. The next prime is 68220253. The reversal of 68220233 is 33202286.

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., 61418569 + 6801664 = 7837^2 + 2608^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68220233 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (68220223) 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 as a sum of consecutive naturals, namely, 34110116 + 34110117.

It is an arithmetic number, because the mean of its divisors is an integer number (34110117).

Almost surely, 2^68220233 is an apocalyptic number.

It is an amenable number.

68220233 is a deficient number, since it is larger than the sum of its proper divisors (1).

68220233 is an equidigital number, since it uses as much as digits as its factorization.

68220233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 68220233 is about 8259.5540436515. The cubic root of 68220233 is about 408.6056800179.

The spelling of 68220233 in words is "sixty-eight million, two hundred twenty thousand, two hundred thirty-three".