6688923 has 8 divisors (see below), whose sum is σ = 9005568. Its totient is φ = 4415784.

The previous prime is 6688919. The next prime is 6688933. The reversal of 6688923 is 3298866.

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

It is not a de Polignac number, because 6688923 - 2² = 6688919 is a prime.

6688923 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6688933) 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, 10515 + ... + 11132.

It is an arithmetic number, because the mean of its divisors is an integer number (1125696).

Almost surely, 2^6688923 is an apocalyptic number.

6688923 is a deficient number, since it is larger than the sum of its proper divisors (2316645).

6688923 is a wasteful number, since it uses less digits than its factorization.

6688923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21753.

The product of its digits is 124416, while the sum is 42.

The square root of 6688923 is about 2586.2952267674. The cubic root of 6688923 is about 188.4164132544.

It can be divided in two parts, 668 and 8923, that added together give a triangular number (9591 = T₁₃₈).

The spelling of 6688923 in words is "six million, six hundred eighty-eight thousand, nine hundred twenty-three".