6623969 has 4 divisors (see below), whose sum is σ = 7226160. Its totient is φ = 6021780.

The previous prime is 6623963. The next prime is 6624017. The reversal of 6623969 is 9693266.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6623969 is a prime.

It is a super-2 number, since 2×6623969² = 87753930625922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6623963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301079 + ... + 301100.

It is an arithmetic number, because the mean of its divisors is an integer number (1806540).

Almost surely, 2^6623969 is an apocalyptic number.

It is an amenable number.

6623969 is a deficient number, since it is larger than the sum of its proper divisors (602191).

6623969 is a wasteful number, since it uses less digits than its factorization.

6623969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602190.

The product of its digits is 104976, while the sum is 41.

The square root of 6623969 is about 2573.7072483093. The cubic root of 6623969 is about 187.8045444871.

The spelling of 6623969 in words is "six million, six hundred twenty-three thousand, nine hundred sixty-nine".