82509841 has 4 divisors (see below), whose sum is σ = 82688512. Its totient is φ = 82331172.

The previous prime is 82509827. The next prime is 82509859. The reversal of 82509841 is 14890528.

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 82509841 - 2¹¹ = 82507793 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82509841.

It is not an unprimeable number, because it can be changed into a prime (82509811) 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, 88641 + ... + 89566.

It is an arithmetic number, because the mean of its divisors is an integer number (20672128).

Almost surely, 2^82509841 is an apocalyptic number.

It is an amenable number.

82509841 is a deficient number, since it is larger than the sum of its proper divisors (178671).

82509841 is a wasteful number, since it uses less digits than its factorization.

82509841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178670.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 82509841 is about 9083.4927753590. The cubic root of 82509841 is about 435.3466932704.

The spelling of 82509841 in words is "eighty-two million, five hundred nine thousand, eight hundred forty-one".