83928381 has 8 divisors (see below), whose sum is σ = 111975360. Its totient is φ = 55916832.

The previous prime is 83928379. The next prime is 83928391. The reversal of 83928381 is 18382938.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 83928381 - 2¹ = 83928379 is a prime.

It is a super-2 number, since 2×83928381² = 14087946274562322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83928391) 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 7 ways as a sum of consecutive naturals, for example, 2721 + ... + 13238.

It is an arithmetic number, because the mean of its divisors is an integer number (13996920).

Almost surely, 2^83928381 is an apocalyptic number.

It is an amenable number.

83928381 is a deficient number, since it is larger than the sum of its proper divisors (28046979).

83928381 is a wasteful number, since it uses less digits than its factorization.

83928381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17715.

The product of its digits is 82944, while the sum is 42.

The square root of 83928381 is about 9161.2434199731. The cubic root of 83928381 is about 437.8274116215.

The spelling of 83928381 in words is "eighty-three million, nine hundred twenty-eight thousand, three hundred eighty-one".