68784571 has 2 divisors, whose sum is σ = 68784572. Its totient is φ = 68784570.

The previous prime is 68784481. The next prime is 68784581. The reversal of 68784571 is 17548786.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68784571 - 2¹⁵ = 68751803 is a prime.

It is not a weakly prime, because it can be changed into another prime (68784581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34392285 + 34392286.

It is an arithmetic number, because the mean of its divisors is an integer number (34392286).

Almost surely, 2^68784571 is an apocalyptic number.

68784571 is a deficient number, since it is larger than the sum of its proper divisors (1).

68784571 is an equidigital number, since it uses as much as digits as its factorization.

68784571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 376320, while the sum is 46.

The square root of 68784571 is about 8293.6464236185. The cubic root of 68784571 is about 409.7292898682.

It can be divided in two parts, 6878 and 4571, that added together give a square (11449 = 107²).

The spelling of 68784571 in words is "sixty-eight million, seven hundred eighty-four thousand, five hundred seventy-one".