81882983 has 16 divisors (see below), whose sum is σ = 100994880. Its totient is φ = 64647936.

The previous prime is 81882971. The next prime is 81883001. The reversal of 81882983 is 38928818.

It is a cyclic number.

It is not a de Polignac number, because 81882983 - 2⁶ = 81882919 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81882083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71963 + ... + 73091.

It is an arithmetic number, because the mean of its divisors is an integer number (6312180).

Almost surely, 2^81882983 is an apocalyptic number.

81882983 is a deficient number, since it is larger than the sum of its proper divisors (19111897).

81882983 is a wasteful number, since it uses less digits than its factorization.

81882983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946.

The product of its digits is 221184, while the sum is 47.

The square root of 81882983 is about 9048.9216484618. The cubic root of 81882983 is about 434.2413923953.

The spelling of 81882983 in words is "eighty-one million, eight hundred eighty-two thousand, nine hundred eighty-three".