68215793 has 2 divisors, whose sum is σ = 68215794. Its totient is φ = 68215792.

The previous prime is 68215787. The next prime is 68215813. The reversal of 68215793 is 39751286.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45252529 + 22963264 = 6727^2 + 4792^2 .

It is a cyclic number.

It is not a de Polignac number, because 68215793 - 2⁶ = 68215729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68215793.

It is not a weakly prime, because it can be changed into another prime (68215783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34107896 + 34107897.

It is an arithmetic number, because the mean of its divisors is an integer number (34107897).

Almost surely, 2^68215793 is an apocalyptic number.

It is an amenable number.

68215793 is a deficient number, since it is larger than the sum of its proper divisors (1).

68215793 is an equidigital number, since it uses as much as digits as its factorization.

68215793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 68215793 is about 8259.2852596335. The cubic root of 68215793 is about 408.5968153527.

The spelling of 68215793 in words is "sixty-eight million, two hundred fifteen thousand, seven hundred ninety-three".