1689747608 has 16 divisors (see below), whose sum is σ = 3241958280. Its totient is φ = 825225408.

The previous prime is 1689747607. The next prime is 1689747613. The reversal of 1689747608 is 8067479861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689747607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2455685 + ... + 2456372.

Almost surely, 2^1689747608 is an apocalyptic number.

It is an amenable number.

1689747608 is a deficient number, since it is larger than the sum of its proper divisors (1552210672).

1689747608 is a wasteful number, since it uses less digits than its factorization.

1689747608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4912106 (or 4912102 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 56.

The square root of 1689747608 is about 41106.5397230173. The cubic root of 1689747608 is about 1191.0791256350.

The spelling of 1689747608 in words is "one billion, six hundred eighty-nine million, seven hundred forty-seven thousand, six hundred eight".