82109369 has 2 divisors, whose sum is σ = 82109370. Its totient is φ = 82109368.

The previous prime is 82109323. The next prime is 82109381. The reversal of 82109369 is 96390128.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57229225 + 24880144 = 7565^2 + 4988^2 .

It is a cyclic number.

It is not a de Polignac number, because 82109369 - 2⁸ = 82109113 is a prime.

It is a super-2 number, since 2×82109369² = 13483896955156322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (82109399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41054684 + 41054685.

It is an arithmetic number, because the mean of its divisors is an integer number (41054685).

Almost surely, 2^82109369 is an apocalyptic number.

It is an amenable number.

82109369 is a deficient number, since it is larger than the sum of its proper divisors (1).

82109369 is an equidigital number, since it uses as much as digits as its factorization.

82109369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 82109369 is about 9061.4220186459. The cubic root of 82109369 is about 434.6412138226.

The spelling of 82109369 in words is "eighty-two million, one hundred nine thousand, three hundred sixty-nine".