1689599109 has 12 divisors (see below), whose sum is σ = 2476217408. Its totient is φ = 1023999240.

The previous prime is 1689599083. The next prime is 1689599143. The reversal of 1689599109 is 9019959861.

It is not a de Polignac number, because 1689599109 - 2⁸ = 1689598853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689599209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2326909 + ... + 2327634.

Almost surely, 2^1689599109 is an apocalyptic number.

It is an amenable number.

1689599109 is a deficient number, since it is larger than the sum of its proper divisors (786618299).

1689599109 is a wasteful number, since it uses less digits than its factorization.

1689599109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4654568 (or 4654557 counting only the distinct ones).

The product of its (nonzero) digits is 1574640, while the sum is 57.

The square root of 1689599109 is about 41104.7334135620. The cubic root of 1689599109 is about 1191.0442329997.

The spelling of 1689599109 in words is "one billion, six hundred eighty-nine million, five hundred ninety-nine thousand, one hundred nine".