13091871 has 8 divisors (see below), whose sum is σ = 18798640. Its totient is φ = 8056512.

The previous prime is 13091849. The next prime is 13091873. The reversal of 13091871 is 17819031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13091871 - 2⁹ = 13091359 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 (13091873) 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 7 ways as a sum of consecutive naturals, for example, 167806 + ... + 167883.

It is an arithmetic number, because the mean of its divisors is an integer number (2349830).

Almost surely, 2^13091871 is an apocalyptic number.

13091871 is a deficient number, since it is larger than the sum of its proper divisors (5706769).

13091871 is a wasteful number, since it uses less digits than its factorization.

13091871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335705.

The product of its (nonzero) digits is 1512, while the sum is 30.

The square root of 13091871 is about 3618.2690613054. The cubic root of 13091871 is about 235.6860651509.

The spelling of 13091871 in words is "thirteen million, ninety-one thousand, eight hundred seventy-one".