13877971 has 2 divisors, whose sum is σ = 13877972. Its totient is φ = 13877970.

The previous prime is 13877939. The next prime is 13878017. The reversal of 13877971 is 17977831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13877971 - 2⁵ = 13877939 is a prime.

It is not a weakly prime, because it can be changed into another prime (13878971) 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, 6938985 + 6938986.

It is an arithmetic number, because the mean of its divisors is an integer number (6938986).

Almost surely, 2^13877971 is an apocalyptic number.

13877971 is a deficient number, since it is larger than the sum of its proper divisors (1).

13877971 is an equidigital number, since it uses as much as digits as its factorization.

13877971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 74088, while the sum is 43.

The square root of 13877971 is about 3725.3148860197. The cubic root of 13877971 is about 240.3119265911.

The spelling of 13877971 in words is "thirteen million, eight hundred seventy-seven thousand, nine hundred seventy-one".