68663393 has 2 divisors, whose sum is σ = 68663394. Its totient is φ = 68663392.

The previous prime is 68663383. The next prime is 68663401. The reversal of 68663393 is 39336686.

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., 43191184 + 25472209 = 6572^2 + 5047^2 .

It is a cyclic number.

It is not a de Polignac number, because 68663393 - 2⁴ = 68663377 is a prime.

It is not a weakly prime, because it can be changed into another prime (68663333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34331696 + 34331697.

It is an arithmetic number, because the mean of its divisors is an integer number (34331697).

Almost surely, 2^68663393 is an apocalyptic number.

It is an amenable number.

68663393 is a deficient number, since it is larger than the sum of its proper divisors (1).

68663393 is an equidigital number, since it uses as much as digits as its factorization.

68663393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 44.

The square root of 68663393 is about 8286.3377314710. The cubic root of 68663393 is about 409.4885413010.

The spelling of 68663393 in words is "sixty-eight million, six hundred sixty-three thousand, three hundred ninety-three".