16489871 has 4 divisors (see below), whose sum is σ = 16518000. Its totient is φ = 16461744.

The previous prime is 16489843. The next prime is 16489883. The reversal of 16489871 is 17898461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16489871 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 (16489171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13166 + ... + 14363.

It is an arithmetic number, because the mean of its divisors is an integer number (4129500).

Almost surely, 2^16489871 is an apocalyptic number.

16489871 is a deficient number, since it is larger than the sum of its proper divisors (28129).

16489871 is an equidigital number, since it uses as much as digits as its factorization.

16489871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28128.

The product of its digits is 96768, while the sum is 44.

The square root of 16489871 is about 4060.7722172020. The cubic root of 16489871 is about 254.5300636218.

The spelling of 16489871 in words is "sixteen million, four hundred eighty-nine thousand, eight hundred seventy-one".