83133981 has 24 divisors (see below), whose sum is σ = 141972480. Its totient is φ = 45866016.

The previous prime is 83133959. The next prime is 83133997. The reversal of 83133981 is 18933138.

It is not a de Polignac number, because 83133981 - 2⁶ = 83133917 is a prime.

It is a super-2 number, since 2×83133981² = 13822517593816722, 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 (83133901) 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 23 ways as a sum of consecutive naturals, for example, 20925 + ... + 24578.

It is an arithmetic number, because the mean of its divisors is an integer number (5915520).

Almost surely, 2^83133981 is an apocalyptic number.

It is an amenable number.

83133981 is a deficient number, since it is larger than the sum of its proper divisors (58838499).

83133981 is a wasteful number, since it uses less digits than its factorization.

83133981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45545 (or 45542 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 83133981 is about 9117.7837767738. The cubic root of 83133981 is about 436.4416536523.

The spelling of 83133981 in words is "eighty-three million, one hundred thirty-three thousand, nine hundred eighty-one".