684068111 has 2 divisors, whose sum is σ = 684068112. Its totient is φ = 684068110.

The previous prime is 684068087. The next prime is 684068129. The reversal of 684068111 is 111860486.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 684068111 - 2²⁶ = 616959247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684068711) 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, 342034055 + 342034056.

It is an arithmetic number, because the mean of its divisors is an integer number (342034056).

Almost surely, 2^684068111 is an apocalyptic number.

684068111 is a deficient number, since it is larger than the sum of its proper divisors (1).

684068111 is an equidigital number, since it uses as much as digits as its factorization.

684068111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 684068111 is about 26154.6957734171. The cubic root of 684068111 is about 881.1160559901.

The spelling of 684068111 in words is "six hundred eighty-four million, sixty-eight thousand, one hundred eleven".