16871691 has 16 divisors (see below), whose sum is σ = 22911264. Its totient is φ = 11042304.

The previous prime is 16871669. The next prime is 16871711. The reversal of 16871691 is 19617861.

It is not a de Polignac number, because 16871691 - 2¹⁵ = 16838923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16871291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53065 + ... + 53381.

It is an arithmetic number, because the mean of its divisors is an integer number (1431954).

Almost surely, 2^16871691 is an apocalyptic number.

16871691 is a deficient number, since it is larger than the sum of its proper divisors (6039573).

16871691 is a wasteful number, since it uses less digits than its factorization.

16871691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590.

The product of its digits is 18144, while the sum is 39.

The square root of 16871691 is about 4107.5164028887. The cubic root of 16871691 is about 256.4796255414.

The spelling of 16871691 in words is "sixteen million, eight hundred seventy-one thousand, six hundred ninety-one".