16871639 has 8 divisors (see below), whose sum is σ = 17822640. Its totient is φ = 15926976.

The previous prime is 16871629. The next prime is 16871663. The reversal of 16871639 is 93617861.

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

It is a cyclic number.

It is not a de Polignac number, because 16871639 - 2⁸ = 16871383 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16871596 and 16871605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16871629) 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 7 ways as a sum of consecutive naturals, for example, 4529 + ... + 7365.

It is an arithmetic number, because the mean of its divisors is an integer number (2227830).

Almost surely, 2^16871639 is an apocalyptic number.

16871639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

16871639 is a deficient number, since it is larger than the sum of its proper divisors (951001).

16871639 is a wasteful number, since it uses less digits than its factorization.

16871639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3169.

The product of its digits is 54432, while the sum is 41.

The square root of 16871639 is about 4107.5100730248. The cubic root of 16871639 is about 256.4793620437.

The spelling of 16871639 in words is "sixteen million, eight hundred seventy-one thousand, six hundred thirty-nine".