82818239 has 8 divisors (see below), whose sum is σ = 98764800. Its totient is φ = 67900536.

The previous prime is 82818233. The next prime is 82818257. The reversal of 82818239 is 93281828.

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 82818239 - 2²⁰ = 81769663 is a prime.

It is a super-2 number, since 2×82818239² = 13717721422122242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82818196 and 82818205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82818233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257039 + ... + 257360.

It is an arithmetic number, because the mean of its divisors is an integer number (12345600).

Almost surely, 2^82818239 is an apocalyptic number.

82818239 is a deficient number, since it is larger than the sum of its proper divisors (15946561).

82818239 is a wasteful number, since it uses less digits than its factorization.

82818239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514429.

The product of its digits is 55296, while the sum is 41.

The square root of 82818239 is about 9100.4526810483. The cubic root of 82818239 is about 435.8884190381. Note that the first 3 decimals are identical.

The spelling of 82818239 in words is "eighty-two million, eight hundred eighteen thousand, two hundred thirty-nine".