684613379 has 2 divisors, whose sum is σ = 684613380. Its totient is φ = 684613378.

The previous prime is 684613297. The next prime is 684613463. The reversal of 684613379 is 973316486.

It is a happy number.

684613379 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 not a de Polignac number, because 684613379 - 2²⁰ = 683564803 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (684613679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342306689 + 342306690.

It is an arithmetic number, because the mean of its divisors is an integer number (342306690).

Almost surely, 2^684613379 is an apocalyptic number.

684613379 is a deficient number, since it is larger than the sum of its proper divisors (1).

684613379 is an equidigital number, since it uses as much as digits as its factorization.

684613379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 47.

The square root of 684613379 is about 26165.1175995828. The cubic root of 684613379 is about 881.3501051951.

The spelling of 684613379 in words is "six hundred eighty-four million, six hundred thirteen thousand, three hundred seventy-nine".