82809641 has 4 divisors (see below), whose sum is σ = 82838784. Its totient is φ = 82780500.

The previous prime is 82809611. The next prime is 82809647. The reversal of 82809641 is 14690828.

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 82809641 - 2¹⁰ = 82808617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82809595 and 82809604.

It is not an unprimeable number, because it can be changed into a prime (82809647) 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, 9785 + ... + 16166.

It is an arithmetic number, because the mean of its divisors is an integer number (20709696).

Almost surely, 2^82809641 is an apocalyptic number.

It is an amenable number.

82809641 is a deficient number, since it is larger than the sum of its proper divisors (29143).

82809641 is a wasteful number, since it uses less digits than its factorization.

82809641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29142.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 82809641 is about 9099.9802747039. The cubic root of 82809641 is about 435.8733342034.

The spelling of 82809641 in words is "eighty-two million, eight hundred nine thousand, six hundred forty-one".