68921843 has 2 divisors, whose sum is σ = 68921844. Its totient is φ = 68921842.

The previous prime is 68921837. The next prime is 68921849. The reversal of 68921843 is 34812986.

It is a balanced prime because it is at equal distance from previous prime (68921837) and next prime (68921849).

It is a cyclic number.

It is not a de Polignac number, because 68921843 - 2¹² = 68917747 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68921843.

It is not a weakly prime, because it can be changed into another prime (68921849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34460921 + 34460922.

It is an arithmetic number, because the mean of its divisors is an integer number (34460922).

Almost surely, 2^68921843 is an apocalyptic number.

68921843 is a deficient number, since it is larger than the sum of its proper divisors (1).

68921843 is an equidigital number, since it uses as much as digits as its factorization.

68921843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 41.

The square root of 68921843 is about 8301.9180313949. The cubic root of 68921843 is about 410.0016716172.

The spelling of 68921843 in words is "sixty-eight million, nine hundred twenty-one thousand, eight hundred forty-three".