683500009 has 2 divisors, whose sum is σ = 683500010. Its totient is φ = 683500008.

The previous prime is 683500003. The next prime is 683500019. The reversal of 683500009 is 900005386.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 438483600 + 245016409 = 20940^2 + 15653^2 .

It is a cyclic number.

It is not a de Polignac number, because 683500009 - 2¹¹ = 683497961 is a prime.

It is not a weakly prime, because it can be changed into another prime (683500003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 341750004 + 341750005.

It is an arithmetic number, because the mean of its divisors is an integer number (341750005).

Almost surely, 2^683500009 is an apocalyptic number.

It is an amenable number.

683500009 is a deficient number, since it is larger than the sum of its proper divisors (1).

683500009 is an equidigital number, since it uses as much as digits as its factorization.

683500009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 683500009 is about 26143.8330969275. The cubic root of 683500009 is about 880.8720732549.

The spelling of 683500009 in words is "six hundred eighty-three million, five hundred thousand, nine".