1688903689 has 8 divisors (see below), whose sum is σ = 1843079040. Its totient is φ = 1534834800.

The previous prime is 1688903627. The next prime is 1688903717. The reversal of 1688903689 is 9863098861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1688903689 - 2¹⁵ = 1688870921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1688903609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8592 + ... + 58750.

It is an arithmetic number, because the mean of its divisors is an integer number (230384880).

Almost surely, 2^1688903689 is an apocalyptic number.

It is an amenable number.

1688903689 is a deficient number, since it is larger than the sum of its proper divisors (154175351).

1688903689 is a wasteful number, since it uses less digits than its factorization.

1688903689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53231.

The product of its (nonzero) digits is 4478976, while the sum is 58.

The square root of 1688903689 is about 41096.2734198613. The cubic root of 1688903689 is about 1190.8808037700.

The spelling of 1688903689 in words is "one billion, six hundred eighty-eight million, nine hundred three thousand, six hundred eighty-nine".