68784811 has 4 divisors (see below), whose sum is σ = 68801400. Its totient is φ = 68768224.

The previous prime is 68784799. The next prime is 68784827. The reversal of 68784811 is 11848786.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 68784811 - 2⁹ = 68784299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68784311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4035 + ... + 12403.

It is an arithmetic number, because the mean of its divisors is an integer number (17200350).

Almost surely, 2^68784811 is an apocalyptic number.

68784811 is a deficient number, since it is larger than the sum of its proper divisors (16589).

68784811 is an equidigital number, since it uses as much as digits as its factorization.

68784811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16588.

The product of its digits is 86016, while the sum is 43.

The square root of 68784811 is about 8293.6608925130. The cubic root of 68784811 is about 409.7297664040.

The spelling of 68784811 in words is "sixty-eight million, seven hundred eighty-four thousand, eight hundred eleven".