81944883 has 24 divisors (see below), whose sum is σ = 125099520. Its totient is φ = 51582960.

The previous prime is 81944867. The next prime is 81944887. The reversal of 81944883 is 38844918.

81944883 is a `hidden beast` number, since 81 + 94 + 488 + 3 = 666.

It is not a de Polignac number, because 81944883 - 2⁴ = 81944867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81944887) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13848 + ... + 18858.

It is an arithmetic number, because the mean of its divisors is an integer number (5212480).

Almost surely, 2^81944883 is an apocalyptic number.

81944883 is a deficient number, since it is larger than the sum of its proper divisors (43154637).

81944883 is a wasteful number, since it uses less digits than its factorization.

81944883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5119 (or 5116 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 81944883 is about 9052.3412993545. The cubic root of 81944883 is about 434.3507874156.

The spelling of 81944883 in words is "eighty-one million, nine hundred forty-four thousand, eight hundred eighty-three".