68791493 has 2 divisors, whose sum is σ = 68791494. Its totient is φ = 68791492.

The previous prime is 68791433. The next prime is 68791519. The reversal of 68791493 is 39419786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57183844 + 11607649 = 7562^2 + 3407^2 .

It is a cyclic number.

It is not a de Polignac number, because 68791493 - 2⁸ = 68791237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68791423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34395746 + 34395747.

It is an arithmetic number, because the mean of its divisors is an integer number (34395747).

Almost surely, 2^68791493 is an apocalyptic number.

It is an amenable number.

68791493 is a deficient number, since it is larger than the sum of its proper divisors (1).

68791493 is an equidigital number, since it uses as much as digits as its factorization.

68791493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 47.

The square root of 68791493 is about 8294.0637205172. The cubic root of 68791493 is about 409.7430335076.

The spelling of 68791493 in words is "sixty-eight million, seven hundred ninety-one thousand, four hundred ninety-three".