1689697688 has 32 divisors (see below), whose sum is σ = 3629007360. Its totient is φ = 722510880.

The previous prime is 1689697661. The next prime is 1689697703. The reversal of 1689697688 is 8867969861.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 9248 + ... + 58863.

It is an arithmetic number, because the mean of its divisors is an integer number (113406480).

Almost surely, 2^1689697688 is an apocalyptic number.

It is an amenable number.

1689697688 is an abundant number, since it is smaller than the sum of its proper divisors (1939309672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1689697688 is a wasteful number, since it uses less digits than its factorization.

1689697688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68567 (or 68563 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 68.

The square root of 1689697688 is about 41105.9325158790. The cubic root of 1689697688 is about 1191.0673962194.

The spelling of 1689697688 in words is "one billion, six hundred eighty-nine million, six hundred ninety-seven thousand, six hundred eighty-eight".