684323207 has 2 divisors, whose sum is σ = 684323208. Its totient is φ = 684323206.

The previous prime is 684323183. The next prime is 684323239. The reversal of 684323207 is 702323486.

684323207 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-684323207 is a prime.

It is equal to p_35482328 and since 684323207 and 35482328 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684323257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342161603 + 342161604.

It is an arithmetic number, because the mean of its divisors is an integer number (342161604).

Almost surely, 2^684323207 is an apocalyptic number.

684323207 is a deficient number, since it is larger than the sum of its proper divisors (1).

684323207 is an equidigital number, since it uses as much as digits as its factorization.

684323207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 684323207 is about 26159.5719957342. The cubic root of 684323207 is about 881.2255681103.

The spelling of 684323207 in words is "six hundred eighty-four million, three hundred twenty-three thousand, two hundred seven".