81833924 has 12 divisors (see below), whose sum is σ = 147829248. Its totient is φ = 39597000.

The previous prime is 81833923. The next prime is 81833959. The reversal of 81833924 is 42933818.

It is a super-3 number, since 3×81833924³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (81833923) 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, 329852 + ... + 330099.

It is an arithmetic number, because the mean of its divisors is an integer number (12319104).

Almost surely, 2^81833924 is an apocalyptic number.

It is an amenable number.

81833924 is a deficient number, since it is larger than the sum of its proper divisors (65995324).

81833924 is a wasteful number, since it uses less digits than its factorization.

81833924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659986 (or 659984 counting only the distinct ones).

The product of its digits is 41472, while the sum is 38.

The square root of 81833924 is about 9046.2104773214. The cubic root of 81833924 is about 434.1546519288.

The spelling of 81833924 in words is "eighty-one million, eight hundred thirty-three thousand, nine hundred twenty-four".