82061209 has 8 divisors (see below), whose sum is σ = 86913440. Its totient is φ = 77262336.

The previous prime is 82061207. The next prime is 82061249. The reversal of 82061209 is 90216028.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82061209 - 2¹ = 82061207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82061207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10152 + ... + 16345.

It is an arithmetic number, because the mean of its divisors is an integer number (10864180).

Almost surely, 2^82061209 is an apocalyptic number.

It is an amenable number.

82061209 is a deficient number, since it is larger than the sum of its proper divisors (4852231).

82061209 is a wasteful number, since it uses less digits than its factorization.

82061209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26679.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 82061209 is about 9058.7642093169. The cubic root of 82061209 is about 434.5562198081.

The spelling of 82061209 in words is "eighty-two million, sixty-one thousand, two hundred nine".