13971447 has 40 divisors (see below), whose sum is σ = 24474912. Its totient is φ = 7776000.

The previous prime is 13971409. The next prime is 13971469. The reversal of 13971447 is 74417931.

It is not a de Polignac number, because 13971447 - 2¹⁵ = 13938679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13971407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 22947 + ... + 23547.

Almost surely, 2^13971447 is an apocalyptic number.

13971447 is a deficient number, since it is larger than the sum of its proper divisors (10503465).

13971447 is an equidigital number, since it uses as much as digits as its factorization.

13971447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661 (or 652 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 13971447 is about 3737.8398842112. The cubic root of 13971447 is about 240.8502653959.

The spelling of 13971447 in words is "thirteen million, nine hundred seventy-one thousand, four hundred forty-seven".