81067983 has 8 divisors (see below), whose sum is σ = 109459200. Its totient is φ = 53361048.

The previous prime is 81067967. The next prime is 81067993. The reversal of 81067983 is 38976018.

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

It is not a de Polignac number, because 81067983 - 2⁴ = 81067967 is a prime.

It is a Smith number, since the sum of its digits (42) 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 (81067993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170793 + ... + 171266.

It is an arithmetic number, because the mean of its divisors is an integer number (13682400).

Almost surely, 2^81067983 is an apocalyptic number.

81067983 is a deficient number, since it is larger than the sum of its proper divisors (28391217).

81067983 is a wasteful number, since it uses less digits than its factorization.

81067983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342141.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 81067983 is about 9003.7760411952. The cubic root of 81067983 is about 432.7958847154.

It can be divided in two parts, 8 and 1067983, that added together give a triangular number (1067991 = T₁₄₆₁).

The spelling of 81067983 in words is "eighty-one million, sixty-seven thousand, nine hundred eighty-three".