82839661 has 4 divisors (see below), whose sum is σ = 82858012. Its totient is φ = 82821312.

The previous prime is 82839613. The next prime is 82839667. The reversal of 82839661 is 16693828.

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

It can be written as a sum of positive squares in 2 ways, for example, as 54686025 + 28153636 = 7395^2 + 5306^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82839661 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 (82839667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2851 + ... + 13183.

It is an arithmetic number, because the mean of its divisors is an integer number (20714503).

Almost surely, 2^82839661 is an apocalyptic number.

It is an amenable number.

82839661 is a deficient number, since it is larger than the sum of its proper divisors (18351).

82839661 is a wasteful number, since it uses less digits than its factorization.

82839661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18350.

The product of its digits is 124416, while the sum is 43.

The square root of 82839661 is about 9101.6295793665. The cubic root of 82839661 is about 435.9259985087.

The spelling of 82839661 in words is "eighty-two million, eight hundred thirty-nine thousand, six hundred sixty-one".