13623573 has 4 divisors (see below), whose sum is σ = 18164768. Its totient is φ = 9082380.

The previous prime is 13623563. The next prime is 13623581. The reversal of 13623573 is 37532631.

13623573 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 13623573 - 2⁵ = 13623541 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13623573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13623503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2270593 + ... + 2270598.

It is an arithmetic number, because the mean of its divisors is an integer number (4541192).

Almost surely, 2^13623573 is an apocalyptic number.

It is an amenable number.

13623573 is a deficient number, since it is larger than the sum of its proper divisors (4541195).

13623573 is an equidigital number, since it uses as much as digits as its factorization.

13623573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4541194.

The product of its digits is 11340, while the sum is 30.

The square root of 13623573 is about 3691.0124627262. The cubic root of 13623573 is about 238.8344704441.

It can be divided in two parts, 13623 and 573, that added together give a triangular number (14196 = T₁₆₈).

The spelling of 13623573 in words is "thirteen million, six hundred twenty-three thousand, five hundred seventy-three".