13863139 has 2 divisors, whose sum is σ = 13863140. Its totient is φ = 13863138.

The previous prime is 13863121. The next prime is 13863149. The reversal of 13863139 is 93136831.

13863139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13863139 - 2⁷ = 13863011 is a prime.

It is not a weakly prime, because it can be changed into another prime (13863119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6931569 + 6931570.

It is an arithmetic number, because the mean of its divisors is an integer number (6931570).

Almost surely, 2^13863139 is an apocalyptic number.

13863139 is a deficient number, since it is larger than the sum of its proper divisors (1).

13863139 is an equidigital number, since it uses as much as digits as its factorization.

13863139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 34.

The square root of 13863139 is about 3723.3236496442. The cubic root of 13863139 is about 240.2262854210.

The spelling of 13863139 in words is "thirteen million, eight hundred sixty-three thousand, one hundred thirty-nine".