68784671 has 2 divisors, whose sum is σ = 68784672. Its totient is φ = 68784670.

The previous prime is 68784647. The next prime is 68784701. The reversal of 68784671 is 17648786.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68784671 - 2¹⁰ = 68783647 is a prime.

It is a Sophie Germain 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 (68784571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34392335 + 34392336.

It is an arithmetic number, because the mean of its divisors is an integer number (34392336).

Almost surely, 2^68784671 is an apocalyptic number.

68784671 is a deficient number, since it is larger than the sum of its proper divisors (1).

68784671 is an equidigital number, since it uses as much as digits as its factorization.

68784671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 451584, while the sum is 47.

The square root of 68784671 is about 8293.6524523276. The cubic root of 68784671 is about 409.7294884249.

It can be divided in two parts, 687 and 84671, that added together give a palindrome (85358).

The spelling of 68784671 in words is "sixty-eight million, seven hundred eighty-four thousand, six hundred seventy-one".