68688593 has 2 divisors, whose sum is σ = 68688594. Its totient is φ = 68688592.

The previous prime is 68688589. The next prime is 68688661. The reversal of 68688593 is 39588686.

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., 67782289 + 906304 = 8233^2 + 952^2 .

It is a cyclic number.

It is not a de Polignac number, because 68688593 - 2² = 68688589 is a prime.

It is not a weakly prime, because it can be changed into another prime (68688533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34344296 + 34344297.

It is an arithmetic number, because the mean of its divisors is an integer number (34344297).

Almost surely, 2^68688593 is an apocalyptic number.

It is an amenable number.

68688593 is a deficient number, since it is larger than the sum of its proper divisors (1).

68688593 is an equidigital number, since it uses as much as digits as its factorization.

68688593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2488320, while the sum is 53.

The square root of 68688593 is about 8287.8581672227. The cubic root of 68688593 is about 409.5386303351.

The spelling of 68688593 in words is "sixty-eight million, six hundred eighty-eight thousand, five hundred ninety-three".