1689045599 has 2 divisors, whose sum is σ = 1689045600. Its totient is φ = 1689045598.

The previous prime is 1689045593. The next prime is 1689045607. The reversal of 1689045599 is 9955409861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1689045599 - 2⁴ = 1689045583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1689045593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 844522799 + 844522800.

It is an arithmetic number, because the mean of its divisors is an integer number (844522800).

Almost surely, 2^1689045599 is an apocalyptic number.

1689045599 is a deficient number, since it is larger than the sum of its proper divisors (1).

1689045599 is an equidigital number, since it uses as much as digits as its factorization.

1689045599 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3499200, while the sum is 56.

The square root of 1689045599 is about 41097.9999391698. Note that the first 4 decimals coincide. The cubic root of 1689045599 is about 1190.9141573912.

The spelling of 1689045599 in words is "one billion, six hundred eighty-nine million, forty-five thousand, five hundred ninety-nine".