16687371 has 4 divisors (see below), whose sum is σ = 22249832. Its totient is φ = 11124912.

The previous prime is 16687337. The next prime is 16687381. The reversal of 16687371 is 17378661.

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

It is not a de Polignac number, because 16687371 - 2¹¹ = 16685323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16687381) 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, 2781226 + ... + 2781231.

It is an arithmetic number, because the mean of its divisors is an integer number (5562458).

Almost surely, 2^16687371 is an apocalyptic number.

16687371 is a deficient number, since it is larger than the sum of its proper divisors (5562461).

16687371 is an equidigital number, since it uses as much as digits as its factorization.

16687371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5562460.

The product of its digits is 42336, while the sum is 39.

The square root of 16687371 is about 4085.0178702180. The cubic root of 16687371 is about 255.5422065351.

The spelling of 16687371 in words is "sixteen million, six hundred eighty-seven thousand, three hundred seventy-one".