13890111 has 8 divisors (see below), whose sum is σ = 18587184. Its totient is φ = 9226560.

The previous prime is 13890031. The next prime is 13890113. The reversal of 13890111 is 11109831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13890111 - 2⁷ = 13889983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13890113) 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, 7396 + ... + 9081.

It is an arithmetic number, because the mean of its divisors is an integer number (2323398).

Almost surely, 2^13890111 is an apocalyptic number.

13890111 is a deficient number, since it is larger than the sum of its proper divisors (4697073).

13890111 is a wasteful number, since it uses less digits than its factorization.

13890111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16761.

The product of its (nonzero) digits is 216, while the sum is 24.

The square root of 13890111 is about 3726.9439223042. The cubic root of 13890111 is about 240.3819785347.

Adding to 13890111 its reverse (11109831), we get a palindrome (24999942).

The spelling of 13890111 in words is "thirteen million, eight hundred ninety thousand, one hundred eleven".