13877939 has 2 divisors, whose sum is σ = 13877940. Its totient is φ = 13877938.

The previous prime is 13877917. The next prime is 13877971. The reversal of 13877939 is 93977831.

It is a weak prime.

It is an emirp because it is prime and its reverse (93977831) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13877939 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 13877893 and 13877902.

It is not a weakly prime, because it can be changed into another prime (13877909) 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, 6938969 + 6938970.

It is an arithmetic number, because the mean of its divisors is an integer number (6938970).

Almost surely, 2^13877939 is an apocalyptic number.

13877939 is a deficient number, since it is larger than the sum of its proper divisors (1).

13877939 is an equidigital number, since it uses as much as digits as its factorization.

13877939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 285768, while the sum is 47.

The square root of 13877939 is about 3725.3105910783. The cubic root of 13877939 is about 240.3117418862.

The spelling of 13877939 in words is "thirteen million, eight hundred seventy-seven thousand, nine hundred thirty-nine".