68409311 has 2 divisors, whose sum is σ = 68409312. Its totient is φ = 68409310.

The previous prime is 68409301. The next prime is 68409317. The reversal of 68409311 is 11390486.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68409311 - 2⁶ = 68409247 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68409317) 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, 34204655 + 34204656.

It is an arithmetic number, because the mean of its divisors is an integer number (34204656).

Almost surely, 2^68409311 is an apocalyptic number.

68409311 is a deficient number, since it is larger than the sum of its proper divisors (1).

68409311 is an equidigital number, since it uses as much as digits as its factorization.

68409311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 68409311 is about 8270.9921412126. The cubic root of 68409311 is about 408.9828265775.

Adding to 68409311 its reverse (11390486), we get a palindrome (79799797).

The spelling of 68409311 in words is "sixty-eight million, four hundred nine thousand, three hundred eleven".