13207971 has 16 divisors (see below), whose sum is σ = 20507904. Its totient is φ = 7404384.

The previous prime is 13207951. The next prime is 13207979. The reversal of 13207971 is 17970231.

It is not a de Polignac number, because 13207971 - 2¹³ = 13199779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13207979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4821 + ... + 7046.

It is an arithmetic number, because the mean of its divisors is an integer number (1281744).

Almost surely, 2^13207971 is an apocalyptic number.

13207971 is a deficient number, since it is larger than the sum of its proper divisors (7299933).

13207971 is a wasteful number, since it uses less digits than its factorization.

13207971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11930.

The product of its (nonzero) digits is 2646, while the sum is 30.

The square root of 13207971 is about 3634.2772321330. The cubic root of 13207971 is about 236.3807115197.

The spelling of 13207971 in words is "thirteen million, two hundred seven thousand, nine hundred seventy-one".