81738883 has 6 divisors (see below), whose sum is σ = 84009156. Its totient is φ = 79528392.

The previous prime is 81738869. The next prime is 81738887. The reversal of 81738883 is 38883718.

It is not a de Polignac number, because 81738883 - 2¹⁷ = 81607811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81738887) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28485 + ... + 31222.

It is an arithmetic number, because the mean of its divisors is an integer number (14001526).

Almost surely, 2^81738883 is an apocalyptic number.

81738883 is a deficient number, since it is larger than the sum of its proper divisors (2270273).

81738883 is an equidigital number, since it uses as much as digits as its factorization.

81738883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59781 (or 59744 counting only the distinct ones).

The product of its digits is 258048, while the sum is 46.

The square root of 81738883 is about 9040.9558676060. The cubic root of 81738883 is about 433.9865127085.

It can be divided in two parts, 81738 and 883, that added together give a triangular number (82621 = T₄₀₆).

The spelling of 81738883 in words is "eighty-one million, seven hundred thirty-eight thousand, eight hundred eighty-three".