68090843 has 2 divisors, whose sum is σ = 68090844. Its totient is φ = 68090842.

The previous prime is 68090819. The next prime is 68090863. The reversal of 68090843 is 34809086.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68090843 - 2⁸ = 68090587 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 68090797 and 68090806.

It is not a weakly prime, because it can be changed into another prime (68090863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34045421 + 34045422.

It is an arithmetic number, because the mean of its divisors is an integer number (34045422).

Almost surely, 2^68090843 is an apocalyptic number.

68090843 is a deficient number, since it is larger than the sum of its proper divisors (1).

68090843 is an equidigital number, since it uses as much as digits as its factorization.

68090843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 68090843 is about 8251.7175787832. The cubic root of 68090843 is about 408.3471890157.

The spelling of 68090843 in words is "sixty-eight million, ninety thousand, eight hundred forty-three".