13605623 has 8 divisors (see below), whose sum is σ = 14039280. Its totient is φ = 13178880.

The previous prime is 13605619. The next prime is 13605629. The reversal of 13605623 is 32650631.

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

It is a cyclic number.

It is not a de Polignac number, because 13605623 - 2² = 13605619 is a prime.

It is a super-2 number, since 2×13605623² = 370225954436258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13605592 and 13605601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13605629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2423 + ... + 5751.

It is an arithmetic number, because the mean of its divisors is an integer number (1754910).

Almost surely, 2^13605623 is an apocalyptic number.

13605623 is a deficient number, since it is larger than the sum of its proper divisors (433657).

13605623 is an equidigital number, since it uses as much as digits as its factorization.

13605623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3457.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 13605623 is about 3688.5800791090. The cubic root of 13605623 is about 238.7295306958.

The spelling of 13605623 in words is "thirteen million, six hundred five thousand, six hundred twenty-three".