13870939 has 2 divisors, whose sum is σ = 13870940. Its totient is φ = 13870938.

The previous prime is 13870937. The next prime is 13870951. The reversal of 13870939 is 93907831.

13870939 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (93907831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13870939 - 2¹ = 13870937 is a prime.

Together with 13870937, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13870933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6935469 + 6935470.

It is an arithmetic number, because the mean of its divisors is an integer number (6935470).

Almost surely, 2^13870939 is an apocalyptic number.

13870939 is a deficient number, since it is larger than the sum of its proper divisors (1).

13870939 is an equidigital number, since it uses as much as digits as its factorization.

13870939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 13870939 is about 3724.3709535974. The cubic root of 13870939 is about 240.2713308641.

The spelling of 13870939 in words is "thirteen million, eight hundred seventy thousand, nine hundred thirty-nine".