684873347 has 2 divisors, whose sum is σ = 684873348. Its totient is φ = 684873346.

The previous prime is 684873317. The next prime is 684873383. The reversal of 684873347 is 743378486.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 684873347 - 2⁶ = 684873283 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 684873295 and 684873304.

It is not a weakly prime, because it can be changed into another prime (684873317) 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, 342436673 + 342436674.

It is an arithmetic number, because the mean of its divisors is an integer number (342436674).

Almost surely, 2^684873347 is an apocalyptic number.

684873347 is a deficient number, since it is larger than the sum of its proper divisors (1).

684873347 is an equidigital number, since it uses as much as digits as its factorization.

684873347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2709504, while the sum is 50.

The square root of 684873347 is about 26170.0849635610. The cubic root of 684873347 is about 881.4616493336.

The spelling of 684873347 in words is "six hundred eighty-four million, eight hundred seventy-three thousand, three hundred forty-seven".