13653623 has 4 divisors (see below), whose sum is σ = 13794480. Its totient is φ = 13512768.

The previous prime is 13653617. The next prime is 13653637. The reversal of 13653623 is 32635631.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13653623 - 2¹⁰ = 13652599 is a prime.

It is a super-2 number, since 2×13653623² = 372842842052258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13653323) 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, 70283 + ... + 70476.

It is an arithmetic number, because the mean of its divisors is an integer number (3448620).

Almost surely, 2^13653623 is an apocalyptic number.

13653623 is a deficient number, since it is larger than the sum of its proper divisors (140857).

13653623 is an equidigital number, since it uses as much as digits as its factorization.

13653623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140856.

The product of its digits is 9720, while the sum is 29.

The square root of 13653623 is about 3695.0809192763. The cubic root of 13653623 is about 239.0099433898.

The spelling of 13653623 in words is "thirteen million, six hundred fifty-three thousand, six hundred twenty-three".