13971047 has 2 divisors, whose sum is σ = 13971048. Its totient is φ = 13971046.

The previous prime is 13971017. The next prime is 13971073. The reversal of 13971047 is 74017931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13971047 - 2¹⁰ = 13970023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13971017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6985523 + 6985524.

It is an arithmetic number, because the mean of its divisors is an integer number (6985524).

Almost surely, 2^13971047 is an apocalyptic number.

13971047 is a deficient number, since it is larger than the sum of its proper divisors (1).

13971047 is an equidigital number, since it uses as much as digits as its factorization.

13971047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 13971047 is about 3737.7863769884. The cubic root of 13971047 is about 240.8479668741.

Adding to 13971047 its reverse (74017931), we get a palindrome (87988978).

The spelling of 13971047 in words is "thirteen million, nine hundred seventy-one thousand, forty-seven".