81300883 has 4 divisors (see below), whose sum is σ = 84835728. Its totient is φ = 77766040.

The previous prime is 81300881. The next prime is 81300911. The reversal of 81300883 is 38800318.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81300883 - 2¹ = 81300881 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81300881) 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 3 ways as a sum of consecutive naturals, for example, 1767388 + ... + 1767433.

It is an arithmetic number, because the mean of its divisors is an integer number (21208932).

Almost surely, 2^81300883 is an apocalyptic number.

81300883 is a deficient number, since it is larger than the sum of its proper divisors (3534845).

81300883 is a wasteful number, since it uses less digits than its factorization.

81300883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3534844.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 81300883 is about 9016.7002279104. The cubic root of 81300883 is about 433.2099478428.

The spelling of 81300883 in words is "eighty-one million, three hundred thousand, eight hundred eighty-three".