683908789 has 2 divisors, whose sum is σ = 683908790. Its totient is φ = 683908788.

The previous prime is 683908787. The next prime is 683908801. The reversal of 683908789 is 987809386.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 667343889 + 16564900 = 25833^2 + 4070^2 .

It is a cyclic number.

It is not a de Polignac number, because 683908789 - 2¹ = 683908787 is a prime.

Together with 683908787, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (683908783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 341954394 + 341954395.

It is an arithmetic number, because the mean of its divisors is an integer number (341954395).

Almost surely, 2^683908789 is an apocalyptic number.

It is an amenable number.

683908789 is a deficient number, since it is larger than the sum of its proper divisors (1).

683908789 is an equidigital number, since it uses as much as digits as its factorization.

683908789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5225472, while the sum is 58.

The square root of 683908789 is about 26151.6498332323. The cubic root of 683908789 is about 881.0476456130.

The spelling of 683908789 in words is "six hundred eighty-three million, nine hundred eight thousand, seven hundred eighty-nine".