16873421 has 8 divisors (see below), whose sum is σ = 17807040. Its totient is φ = 15956512.

The previous prime is 16873403. The next prime is 16873429. The reversal of 16873421 is 12437861.

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 16873421 - 2¹⁰ = 16872397 is a prime.

It is a super-3 number, since 3×16873421³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16873429) 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 7 ways as a sum of consecutive naturals, for example, 2075 + ... + 6168.

It is an arithmetic number, because the mean of its divisors is an integer number (2225880).

Almost surely, 2^16873421 is an apocalyptic number.

It is an amenable number.

16873421 is a deficient number, since it is larger than the sum of its proper divisors (933619).

16873421 is an equidigital number, since it uses as much as digits as its factorization.

16873421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8355.

The product of its digits is 8064, while the sum is 32.

The square root of 16873421 is about 4107.7269870331. The cubic root of 16873421 is about 256.4883915978.

The spelling of 16873421 in words is "sixteen million, eight hundred seventy-three thousand, four hundred twenty-one".