6689137 has 12 divisors (see below), whose sum is σ = 8380596. Its totient is φ = 5292000.

The previous prime is 6689131. The next prime is 6689141. The reversal of 6689137 is 7319866.

It can be written as a sum of positive squares in 2 ways, for example, as 1449616 + 5239521 = 1204^2 + 2289^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6689137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6689137.

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 11 ways as a sum of consecutive naturals, for example, 4614 + ... + 5887.

It is an arithmetic number, because the mean of its divisors is an integer number (698383).

Almost surely, 2^6689137 is an apocalyptic number.

It is an amenable number.

6689137 is a deficient number, since it is larger than the sum of its proper divisors (1691459).

6689137 is a wasteful number, since it uses less digits than its factorization.

6689137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10528 (or 10521 counting only the distinct ones).

The product of its digits is 54432, while the sum is 40.

The square root of 6689137 is about 2586.3365983568. The cubic root of 6689137 is about 188.4184225805.

The spelling of 6689137 in words is "six million, six hundred eighty-nine thousand, one hundred thirty-seven".