16839481 has 4 divisors (see below), whose sum is σ = 16848000. Its totient is φ = 16830964.

The previous prime is 16839467. The next prime is 16839499. The reversal of 16839481 is 18493861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 18493861 = 449 ⋅41189.

It is a cyclic number.

It is not a de Polignac number, because 16839481 - 2²³ = 8450873 is a prime.

It is a super-3 number, since 3×16839481³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16839451) 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 3 ways as a sum of consecutive naturals, for example, 420 + ... + 5818.

It is an arithmetic number, because the mean of its divisors is an integer number (4212000).

Almost surely, 2^16839481 is an apocalyptic number.

It is an amenable number.

16839481 is a deficient number, since it is larger than the sum of its proper divisors (8519).

16839481 is an equidigital number, since it uses as much as digits as its factorization.

16839481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8518.

The product of its digits is 41472, while the sum is 40.

The square root of 16839481 is about 4103.5936689687. The cubic root of 16839481 is about 256.3163051897.

The spelling of 16839481 in words is "sixteen million, eight hundred thirty-nine thousand, four hundred eighty-one".