13381623 has 6 divisors (see below), whose sum is σ = 19329024. Its totient is φ = 8921076.

The previous prime is 13381597. The next prime is 13381633. The reversal of 13381623 is 32618331.

It is a happy number.

13381623 is a `hidden beast` number, since 1 + 3 + 38 + 1 + 623 = 666.

13381623 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13381623 - 2¹⁰ = 13380599 is a prime.

It is a super-2 number, since 2×13381623² = 358135668228258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13381633) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 743415 + ... + 743432.

It is an arithmetic number, because the mean of its divisors is an integer number (3221504).

Almost surely, 2^13381623 is an apocalyptic number.

13381623 is a deficient number, since it is larger than the sum of its proper divisors (5947401).

13381623 is a wasteful number, since it uses less digits than its factorization.

13381623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486853 (or 1486850 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 13381623 is about 3658.0900754355. The cubic root of 13381623 is about 237.4121440510.

Adding to 13381623 its reverse (32618331), we get a palindrome (45999954).

The spelling of 13381623 in words is "thirteen million, three hundred eighty-one thousand, six hundred twenty-three".