13981111 has 2 divisors, whose sum is σ = 13981112. Its totient is φ = 13981110.

The previous prime is 13981027. The next prime is 13981147. The reversal of 13981111 is 11118931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13981111 - 2¹⁵ = 13948343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13984111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6990555 + 6990556.

It is an arithmetic number, because the mean of its divisors is an integer number (6990556).

Almost surely, 2^13981111 is an apocalyptic number.

13981111 is a deficient number, since it is larger than the sum of its proper divisors (1).

13981111 is an equidigital number, since it uses as much as digits as its factorization.

13981111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 25.

The square root of 13981111 is about 3739.1323859954. The cubic root of 13981111 is about 240.9057843532.

The spelling of 13981111 in words is "thirteen million, nine hundred eighty-one thousand, one hundred eleven".