6623539 has 8 divisors (see below), whose sum is σ = 7187040. Its totient is φ = 6067776.

The previous prime is 6623531. The next prime is 6623549. The reversal of 6623539 is 9353266.

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

It is not a de Polignac number, because 6623539 - 2³ = 6623531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6623531) 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, 79 + ... + 3640.

It is an arithmetic number, because the mean of its divisors is an integer number (898380).

Almost surely, 2^6623539 is an apocalyptic number.

6623539 is a deficient number, since it is larger than the sum of its proper divisors (563501).

6623539 is a wasteful number, since it uses less digits than its factorization.

6623539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3869.

The product of its digits is 29160, while the sum is 34.

The square root of 6623539 is about 2573.6237098690. The cubic root of 6623539 is about 187.8004805741.

The spelling of 6623539 in words is "six million, six hundred twenty-three thousand, five hundred thirty-nine".