68780093 has 2 divisors, whose sum is σ = 68780094. Its totient is φ = 68780092.

The previous prime is 68780059. The next prime is 68780111. The reversal of 68780093 is 39008786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63313849 + 5466244 = 7957^2 + 2338^2 .

It is a cyclic number.

It is not a de Polignac number, because 68780093 - 2¹² = 68775997 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 68780093.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68780053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34390046 + 34390047.

It is an arithmetic number, because the mean of its divisors is an integer number (34390047).

Almost surely, 2^68780093 is an apocalyptic number.

It is an amenable number.

68780093 is a deficient number, since it is larger than the sum of its proper divisors (1).

68780093 is an equidigital number, since it uses as much as digits as its factorization.

68780093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 68780093 is about 8293.3764535321. The cubic root of 68780093 is about 409.7203983026.

The spelling of 68780093 in words is "sixty-eight million, seven hundred eighty thousand, ninety-three".