13081623 has 4 divisors (see below), whose sum is σ = 17442168. Its totient is φ = 8721080.

The previous prime is 13081613. The next prime is 13081631. The reversal of 13081623 is 32618031.

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 13081623 - 2⁵ = 13081591 is a prime.

It is a super-2 number, since 2×13081623² = 342257720628258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13081593 and 13081602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13081613) 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, 2180268 + ... + 2180273.

It is an arithmetic number, because the mean of its divisors is an integer number (4360542).

Almost surely, 2^13081623 is an apocalyptic number.

13081623 is a deficient number, since it is larger than the sum of its proper divisors (4360545).

13081623 is an equidigital number, since it uses as much as digits as its factorization.

13081623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4360544.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 13081623 is about 3616.8526373077. The cubic root of 13081623 is about 235.6245526473.

Adding to 13081623 its reverse (32618031), we get a palindrome (45699654).

The spelling of 13081623 in words is "thirteen million, eighty-one thousand, six hundred twenty-three".