6623913 has 16 divisors (see below), whose sum is σ = 9420800. Its totient is φ = 4127760.

The previous prime is 6623899. The next prime is 6623927. The reversal of 6623913 is 3193266.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6623899) and next prime (6623927).

It is not a de Polignac number, because 6623913 - 2⁹ = 6623401 is a prime.

It is a Duffinian number.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 3768 + ... + 5238.

It is an arithmetic number, because the mean of its divisors is an integer number (588800).

Almost surely, 2^6623913 is an apocalyptic number.

It is an amenable number.

6623913 is a deficient number, since it is larger than the sum of its proper divisors (2796887).

6623913 is a wasteful number, since it uses less digits than its factorization.

6623913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572.

The product of its digits is 5832, while the sum is 30.

The square root of 6623913 is about 2573.6963690381. The cubic root of 6623913 is about 187.8040152433.

The spelling of 6623913 in words is "six million, six hundred twenty-three thousand, nine hundred thirteen".