684241223 has 2 divisors, whose sum is σ = 684241224. Its totient is φ = 684241222.

The previous prime is 684241213. The next prime is 684241247. The reversal of 684241223 is 322142486.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 684241223 - 2²² = 680046919 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 684241223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684241213) 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, 342120611 + 342120612.

It is an arithmetic number, because the mean of its divisors is an integer number (342120612).

Almost surely, 2^684241223 is an apocalyptic number.

684241223 is a deficient number, since it is larger than the sum of its proper divisors (1).

684241223 is an equidigital number, since it uses as much as digits as its factorization.

684241223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 32.

The square root of 684241223 is about 26158.0049506838. The cubic root of 684241223 is about 881.1903755377.

The spelling of 684241223 in words is "six hundred eighty-four million, two hundred forty-one thousand, two hundred twenty-three".