1689695689 has 8 divisors (see below), whose sum is σ = 1844979840. Its totient is φ = 1534690800.

The previous prime is 1689695681. The next prime is 1689695699. The reversal of 1689695689 is 9865969861.

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 1689695689 - 2³ = 1689695681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1689695681) 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 in 7 ways as a sum of consecutive naturals, for example, 57057 + ... + 81454.

It is an arithmetic number, because the mean of its divisors is an integer number (230622480).

Almost surely, 2^1689695689 is an apocalyptic number.

It is an amenable number.

1689695689 is a deficient number, since it is larger than the sum of its proper divisors (155284151).

1689695689 is a wasteful number, since it uses less digits than its factorization.

1689695689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139631.

The product of its digits is 50388480, while the sum is 67.

The square root of 1689695689 is about 41105.9082006468. The cubic root of 1689695689 is about 1191.0669265211.

The spelling of 1689695689 in words is "one billion, six hundred eighty-nine million, six hundred ninety-five thousand, six hundred eighty-nine".