68368493 has 2 divisors, whose sum is σ = 68368494. Its totient is φ = 68368492.

The previous prime is 68368483. The next prime is 68368499. The reversal of 68368493 is 39486386.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61748164 + 6620329 = 7858^2 + 2573^2 .

It is a cyclic number.

It is not a de Polignac number, because 68368493 - 2⁶ = 68368429 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68368499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34184246 + 34184247.

It is an arithmetic number, because the mean of its divisors is an integer number (34184247).

Almost surely, 2^68368493 is an apocalyptic number.

It is an amenable number.

68368493 is a deficient number, since it is larger than the sum of its proper divisors (1).

68368493 is an equidigital number, since it uses as much as digits as its factorization.

68368493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 47.

The square root of 68368493 is about 8268.5242335014. The cubic root of 68368493 is about 408.9014673681.

The spelling of 68368493 in words is "sixty-eight million, three hundred sixty-eight thousand, four hundred ninety-three".