82169239 has 4 divisors (see below), whose sum is σ = 83719656. Its totient is φ = 80618824.

The previous prime is 82169231. The next prime is 82169249. The reversal of 82169239 is 93296128.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 82169239 - 2³ = 82169231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82169231) 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, 775129 + ... + 775234.

It is an arithmetic number, because the mean of its divisors is an integer number (20929914).

Almost surely, 2^82169239 is an apocalyptic number.

82169239 is a deficient number, since it is larger than the sum of its proper divisors (1550417).

82169239 is a wasteful number, since it uses less digits than its factorization.

82169239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550416.

The product of its digits is 46656, while the sum is 40.

The square root of 82169239 is about 9064.7249820389. The cubic root of 82169239 is about 434.7468276225.

The spelling of 82169239 in words is "eighty-two million, one hundred sixty-nine thousand, two hundred thirty-nine".