13623681 has 8 divisors (see below), whose sum is σ = 19233504. Its totient is φ = 8548160.

The previous prime is 13623667. The next prime is 13623697. The reversal of 13623681 is 18632631.

13623681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 13623681 - 2¹⁹ = 13099393 is a prime.

It is a super-3 number, since 3×13623681³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (13623641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133515 + ... + 133616.

It is an arithmetic number, because the mean of its divisors is an integer number (2404188).

Almost surely, 2^13623681 is an apocalyptic number.

It is an amenable number.

13623681 is a deficient number, since it is larger than the sum of its proper divisors (5609823).

13623681 is a wasteful number, since it uses less digits than its factorization.

13623681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267151.

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

The square root of 13623681 is about 3691.0270928293. The cubic root of 13623681 is about 238.8351015574.

The spelling of 13623681 in words is "thirteen million, six hundred twenty-three thousand, six hundred eighty-one".