6689031 has 8 divisors (see below), whose sum is σ = 8974080. Its totient is φ = 4431672.

The previous prime is 6689029. The next prime is 6689047. The reversal of 6689031 is 1309866.

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

It is not a de Polignac number, because 6689031 - 2¹ = 6689029 is a prime.

It is a super-2 number, since 2×6689031² = 89486271437922, which contains 22 as substring.

6689031 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6688983 and 6689001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6689131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6351 + ... + 7328.

It is an arithmetic number, because the mean of its divisors is an integer number (1121760).

Almost surely, 2^6689031 is an apocalyptic number.

6689031 is a deficient number, since it is larger than the sum of its proper divisors (2285049).

6689031 is a wasteful number, since it uses less digits than its factorization.

6689031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13845.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 6689031 is about 2586.3161059700. The cubic root of 6689031 is about 188.4174273122.

The spelling of 6689031 in words is "six million, six hundred eighty-nine thousand, thirty-one".