684987383 has 2 divisors, whose sum is σ = 684987384. Its totient is φ = 684987382.

The previous prime is 684987379. The next prime is 684987427. The reversal of 684987383 is 383789486.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 684987383 - 2² = 684987379 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684987683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342493691 + 342493692.

It is an arithmetic number, because the mean of its divisors is an integer number (342493692).

Almost surely, 2^684987383 is an apocalyptic number.

684987383 is a deficient number, since it is larger than the sum of its proper divisors (1).

684987383 is an equidigital number, since it uses as much as digits as its factorization.

684987383 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6967296, while the sum is 56.

The square root of 684987383 is about 26172.2636200998. The cubic root of 684987383 is about 881.5105697082.

The spelling of 684987383 in words is "six hundred eighty-four million, nine hundred eighty-seven thousand, three hundred eighty-three".