13618623 has 4 divisors (see below), whose sum is σ = 18158168. Its totient is φ = 9079080.

The previous prime is 13618613. The next prime is 13618667. The reversal of 13618623 is 32681631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32681631 = 3 ⋅10893877.

It is not a de Polignac number, because 13618623 - 2¹³ = 13610431 is a prime.

It is a super-2 number, since 2×13618623² = 370933784832258, 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 (13618613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2269768 + ... + 2269773.

It is an arithmetic number, because the mean of its divisors is an integer number (4539542).

Almost surely, 2^13618623 is an apocalyptic number.

13618623 is a deficient number, since it is larger than the sum of its proper divisors (4539545).

13618623 is an equidigital number, since it uses as much as digits as its factorization.

13618623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4539544.

The product of its digits is 5184, while the sum is 30.

The square root of 13618623 is about 3690.3418540834. The cubic root of 13618623 is about 238.8055408370.

It can be divided in two parts, 13618 and 623, that added together give a palindrome (14241).

The spelling of 13618623 in words is "thirteen million, six hundred eighteen thousand, six hundred twenty-three".