82838809 has 2 divisors, whose sum is σ = 82838810. Its totient is φ = 82838808.

The previous prime is 82838779. The next prime is 82838837. The reversal of 82838809 is 90883828.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81504784 + 1334025 = 9028^2 + 1155^2 .

It is a cyclic number.

It is not a de Polignac number, because 82838809 - 2¹⁹ = 82314521 is a prime.

It is not a weakly prime, because it can be changed into another prime (82838839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41419404 + 41419405.

It is an arithmetic number, because the mean of its divisors is an integer number (41419405).

Almost surely, 2^82838809 is an apocalyptic number.

It is an amenable number.

82838809 is a deficient number, since it is larger than the sum of its proper divisors (1).

82838809 is an equidigital number, since it uses as much as digits as its factorization.

82838809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 46.

The square root of 82838809 is about 9101.5827744409. The cubic root of 82838809 is about 435.9245040143.

The spelling of 82838809 in words is "eighty-two million, eight hundred thirty-eight thousand, eight hundred nine".