13993641 has 12 divisors (see below), whose sum is σ = 20962032. Its totient is φ = 9328932.

The previous prime is 13993621. The next prime is 13993691. The reversal of 13993641 is 14639931.

13993641 is a `hidden beast` number, since 1 + 3 + 9 + 9 + 3 + 641 = 666.

13993641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13993641 - 2⁷ = 13993513 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13993596 and 13993605.

It is not an unprimeable number, because it can be changed into a prime (13993621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28551 + ... + 29036.

It is an arithmetic number, because the mean of its divisors is an integer number (1746836).

Almost surely, 2^13993641 is an apocalyptic number.

It is an amenable number.

13993641 is a deficient number, since it is larger than the sum of its proper divisors (6968391).

13993641 is an frugal number, since it uses more digits than its factorization.

13993641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57602 (or 57590 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 13993641 is about 3740.8075331404. The cubic root of 13993641 is about 240.9777301897.

The spelling of 13993641 in words is "thirteen million, nine hundred ninety-three thousand, six hundred forty-one".