81330883 has 4 divisors (see below), whose sum is σ = 81378880. Its totient is φ = 81282888.

The previous prime is 81330863. The next prime is 81330923. The reversal of 81330883 is 38803318.

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 81330883 - 2¹³ = 81322691 is a prime.

It is a super-2 number, since 2×81330883² = 13229425059119378, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81330803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21360 + ... + 24877.

It is an arithmetic number, because the mean of its divisors is an integer number (20344720).

Almost surely, 2^81330883 is an apocalyptic number.

81330883 is a deficient number, since it is larger than the sum of its proper divisors (47997).

81330883 is a wasteful number, since it uses less digits than its factorization.

81330883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47996.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 81330883 is about 9018.3636542335. The cubic root of 81330883 is about 433.2632260678.

The spelling of 81330883 in words is "eighty-one million, three hundred thirty thousand, eight hundred eighty-three".