68389693 has 2 divisors, whose sum is σ = 68389694. Its totient is φ = 68389692.

The previous prime is 68389687. The next prime is 68389697. The reversal of 68389693 is 39698386.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66145689 + 2244004 = 8133^2 + 1498^2 .

It is a cyclic number.

It is not a de Polignac number, because 68389693 - 2⁵ = 68389661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68389693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68389697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34194846 + 34194847.

It is an arithmetic number, because the mean of its divisors is an integer number (34194847).

Almost surely, 2^68389693 is an apocalyptic number.

It is an amenable number.

68389693 is a deficient number, since it is larger than the sum of its proper divisors (1).

68389693 is an equidigital number, since it uses as much as digits as its factorization.

68389693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 52.

The square root of 68389693 is about 8269.8061041357. The cubic root of 68389693 is about 408.9437276495.

The spelling of 68389693 in words is "sixty-eight million, three hundred eighty-nine thousand, six hundred ninety-three".