13864139 has 2 divisors, whose sum is σ = 13864140. Its totient is φ = 13864138.

The previous prime is 13864121. The next prime is 13864171. The reversal of 13864139 is 93146831.

It is a weak prime.

It is an emirp because it is prime and its reverse (93146831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13864139 - 2¹² = 13860043 is a prime.

It is a super-2 number, since 2×13864139² = 384428700422642, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 13864099 and 13864108.

It is not a weakly prime, because it can be changed into another prime (13864339) 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, 6932069 + 6932070.

It is an arithmetic number, because the mean of its divisors is an integer number (6932070).

Almost surely, 2^13864139 is an apocalyptic number.

13864139 is a deficient number, since it is larger than the sum of its proper divisors (1).

13864139 is an equidigital number, since it uses as much as digits as its factorization.

13864139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 35.

The square root of 13864139 is about 3723.4579358440. The cubic root of 13864139 is about 240.2320614219.

The spelling of 13864139 in words is "thirteen million, eight hundred sixty-four thousand, one hundred thirty-nine".