13865207 has 2 divisors, whose sum is σ = 13865208. Its totient is φ = 13865206.

The previous prime is 13865147. The next prime is 13865209. The reversal of 13865207 is 70256831.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13865207 - 2¹⁸ = 13603063 is a prime.

Together with 13865209, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13865209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6932603 + 6932604.

It is an arithmetic number, because the mean of its divisors is an integer number (6932604).

Almost surely, 2^13865207 is an apocalyptic number.

13865207 is a deficient number, since it is larger than the sum of its proper divisors (1).

13865207 is an equidigital number, since it uses as much as digits as its factorization.

13865207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 13865207 is about 3723.6013481575. The cubic root of 13865207 is about 240.2382298841.

The spelling of 13865207 in words is "thirteen million, eight hundred sixty-five thousand, two hundred seven".