13870111 has 2 divisors, whose sum is σ = 13870112. Its totient is φ = 13870110.

The previous prime is 13870099. The next prime is 13870121. The reversal of 13870111 is 11107831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13870111 - 2⁷ = 13869983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13870121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6935055 + 6935056.

It is an arithmetic number, because the mean of its divisors is an integer number (6935056).

Almost surely, 2^13870111 is an apocalyptic number.

13870111 is a deficient number, since it is larger than the sum of its proper divisors (1).

13870111 is an equidigital number, since it uses as much as digits as its factorization.

13870111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 22.

The square root of 13870111 is about 3724.2597922272. The cubic root of 13870111 is about 240.2665499183.

Adding to 13870111 its reverse (11107831), we get a palindrome (24977942).

The spelling of 13870111 in words is "thirteen million, eight hundred seventy thousand, one hundred eleven".