13009871 has 4 divisors (see below), whose sum is σ = 14868432. Its totient is φ = 11151312.

The previous prime is 13009823. The next prime is 13009901. The reversal of 13009871 is 17890031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17890031 = 1289 ⋅13879.

It is a cyclic number.

It is not a de Polignac number, because 13009871 - 2⁶ = 13009807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13009571) 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 in 3 ways as a sum of consecutive naturals, for example, 929270 + ... + 929283.

It is an arithmetic number, because the mean of its divisors is an integer number (3717108).

Almost surely, 2^13009871 is an apocalyptic number.

13009871 is a deficient number, since it is larger than the sum of its proper divisors (1858561).

13009871 is an equidigital number, since it uses as much as digits as its factorization.

13009871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1858560.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 13009871 is about 3606.9198771251. The cubic root of 13009871 is about 235.1929665994.

The spelling of 13009871 in words is "thirteen million, nine thousand, eight hundred seventy-one".