68784849 has 16 divisors (see below), whose sum is σ = 116461440. Its totient is φ = 39305520.

The previous prime is 68784847. The next prime is 68784857. The reversal of 68784849 is 94848786.

It is not a de Polignac number, because 68784849 - 2¹ = 68784847 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 68784795 and 68784804.

It is not an unprimeable number, because it can be changed into a prime (68784847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181782 + ... + 182159.

It is an arithmetic number, because the mean of its divisors is an integer number (7278840).

Almost surely, 2^68784849 is an apocalyptic number.

It is an amenable number.

68784849 is a deficient number, since it is larger than the sum of its proper divisors (47676591).

68784849 is a wasteful number, since it uses less digits than its factorization.

68784849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363957 (or 363951 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The square root of 68784849 is about 8293.6631834190. The cubic root of 68784849 is about 409.7298418553.

The spelling of 68784849 in words is "sixty-eight million, seven hundred eighty-four thousand, eight hundred forty-nine".