82441921 has 4 divisors (see below), whose sum is σ = 83242432. Its totient is φ = 81641412.

The previous prime is 82441907. The next prime is 82441943. The reversal of 82441921 is 12914428.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82441921 - 2⁹ = 82441409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82441981) 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, 400101 + ... + 400306.

It is an arithmetic number, because the mean of its divisors is an integer number (20810608).

Almost surely, 2^82441921 is an apocalyptic number.

It is an amenable number.

82441921 is a deficient number, since it is larger than the sum of its proper divisors (800511).

82441921 is a wasteful number, since it uses less digits than its factorization.

82441921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800510.

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

The square root of 82441921 is about 9079.7533556810. The cubic root of 82441921 is about 435.2272050405.

The spelling of 82441921 in words is "eighty-two million, four hundred forty-one thousand, nine hundred twenty-one".