81441883 has 4 divisors (see below), whose sum is σ = 86232600. Its totient is φ = 76651168.

The previous prime is 81441869. The next prime is 81441901. The reversal of 81441883 is 38814418.

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 81441883 - 2²¹ = 79344731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81441803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2395333 + ... + 2395366.

It is an arithmetic number, because the mean of its divisors is an integer number (21558150).

Almost surely, 2^81441883 is an apocalyptic number.

81441883 is a deficient number, since it is larger than the sum of its proper divisors (4790717).

81441883 is a wasteful number, since it uses less digits than its factorization.

81441883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4790716.

The product of its digits is 24576, while the sum is 37.

The square root of 81441883 is about 9024.5156656743. The cubic root of 81441883 is about 433.4602416590.

The spelling of 81441883 in words is "eighty-one million, four hundred forty-one thousand, eight hundred eighty-three".