68555393 has 2 divisors, whose sum is σ = 68555394. Its totient is φ = 68555392.

The previous prime is 68555381. The next prime is 68555411. The reversal of 68555393 is 39355586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55472704 + 13082689 = 7448^2 + 3617^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68555393 is a prime.

It is not a weakly prime, because it can be changed into another prime (68555303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34277696 + 34277697.

It is an arithmetic number, because the mean of its divisors is an integer number (34277697).

Almost surely, 2^68555393 is an apocalyptic number.

It is an amenable number.

68555393 is a deficient number, since it is larger than the sum of its proper divisors (1).

68555393 is an equidigital number, since it uses as much as digits as its factorization.

68555393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486000, while the sum is 44.

The square root of 68555393 is about 8279.8184158833. The cubic root of 68555393 is about 409.2737350910.

The spelling of 68555393 in words is "sixty-eight million, five hundred fifty-five thousand, three hundred ninety-three".