13924181 has 2 divisors, whose sum is σ = 13924182. Its totient is φ = 13924180.

The previous prime is 13924171. The next prime is 13924187. The reversal of 13924181 is 18142931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10023556 + 3900625 = 3166^2 + 1975^2 .

It is an emirp because it is prime and its reverse (18142931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13924181 - 2⁶ = 13924117 is a prime.

It is a super-2 number, since 2×13924181² = 387765633041522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13924187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6962090 + 6962091.

It is an arithmetic number, because the mean of its divisors is an integer number (6962091).

Almost surely, 2^13924181 is an apocalyptic number.

It is an amenable number.

13924181 is a deficient number, since it is larger than the sum of its proper divisors (1).

13924181 is an equidigital number, since it uses as much as digits as its factorization.

13924181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 29.

The square root of 13924181 is about 3731.5118919816. The cubic root of 13924181 is about 240.5783563045.

The spelling of 13924181 in words is "thirteen million, nine hundred twenty-four thousand, one hundred eighty-one".