13897111 has 2 divisors, whose sum is σ = 13897112. Its totient is φ = 13897110.

The previous prime is 13897099. The next prime is 13897139. The reversal of 13897111 is 11179831.

13897111 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13897111 - 2¹⁵ = 13864343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13897141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6948555 + 6948556.

It is an arithmetic number, because the mean of its divisors is an integer number (6948556).

Almost surely, 2^13897111 is an apocalyptic number.

13897111 is a deficient number, since it is larger than the sum of its proper divisors (1).

13897111 is an equidigital number, since it uses as much as digits as its factorization.

13897111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 31.

The square root of 13897111 is about 3727.8829112514. The cubic root of 13897111 is about 240.4223523725.

The spelling of 13897111 in words is "thirteen million, eight hundred ninety-seven thousand, one hundred eleven".