684987683 has 2 divisors, whose sum is σ = 684987684. Its totient is φ = 684987682.

The previous prime is 684987673. The next prime is 684987701. The reversal of 684987683 is 386789486.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 684987683 - 2⁸ = 684987427 is a prime.

It is not a weakly prime, because it can be changed into another prime (684987673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342493841 + 342493842.

It is an arithmetic number, because the mean of its divisors is an integer number (342493842).

Almost surely, 2^684987683 is an apocalyptic number.

684987683 is a deficient number, since it is larger than the sum of its proper divisors (1).

684987683 is an equidigital number, since it uses as much as digits as its factorization.

684987683 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13934592, while the sum is 59.

The square root of 684987683 is about 26172.2693513574. The cubic root of 684987683 is about 881.5106983982.

The spelling of 684987683 in words is "six hundred eighty-four million, nine hundred eighty-seven thousand, six hundred eighty-three".