16874391 has 4 divisors (see below), whose sum is σ = 22499192. Its totient is φ = 11249592.

The previous prime is 16874381. The next prime is 16874423. The reversal of 16874391 is 19347861.

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

It is not a de Polignac number, because 16874391 - 2⁵ = 16874359 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 (16874381) 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, 2812396 + ... + 2812401.

It is an arithmetic number, because the mean of its divisors is an integer number (5624798).

Almost surely, 2^16874391 is an apocalyptic number.

16874391 is a deficient number, since it is larger than the sum of its proper divisors (5624801).

16874391 is an equidigital number, since it uses as much as digits as its factorization.

16874391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5624800.

The product of its digits is 36288, while the sum is 39.

The square root of 16874391 is about 4107.8450555005. The cubic root of 16874391 is about 256.4933064078.

The spelling of 16874391 in words is "sixteen million, eight hundred seventy-four thousand, three hundred ninety-one".