68821000673 has 2 divisors, whose sum is σ = 68821000674. Its totient is φ = 68821000672.

The previous prime is 68821000627. The next prime is 68821000679. The reversal of 68821000673 is 37600012886.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52144635904 + 16676364769 = 228352^2 + 129137^2 .

It is a cyclic number.

It is not a de Polignac number, because 68821000673 - 2¹⁶ = 68820935137 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 68821000673.

It is not a weakly prime, because it can be changed into another prime (68821000679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34410500336 + 34410500337.

It is an arithmetic number, because the mean of its divisors is an integer number (34410500337).

Almost surely, 2^68821000673 is an apocalyptic number.

It is an amenable number.

68821000673 is a deficient number, since it is larger than the sum of its proper divisors (1).

68821000673 is an equidigital number, since it uses as much as digits as its factorization.

68821000673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 41.

The spelling of 68821000673 in words is "sixty-eight billion, eight hundred twenty-one million, six hundred seventy-three", and thus it is an aban number.