82047861 has 12 divisors (see below), whose sum is σ = 135444192. Its totient is φ = 46884456.

The previous prime is 82047857. The next prime is 82047881. The reversal of 82047861 is 16874028.

It is not a de Polignac number, because 82047861 - 2² = 82047857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82047841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 651111 + ... + 651236.

It is an arithmetic number, because the mean of its divisors is an integer number (11287016).

Almost surely, 2^82047861 is an apocalyptic number.

It is an amenable number.

82047861 is a deficient number, since it is larger than the sum of its proper divisors (53396331).

82047861 is a wasteful number, since it uses less digits than its factorization.

82047861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302360 (or 1302357 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 82047861 is about 9058.0274342707. The cubic root of 82047861 is about 434.5326570269.

The spelling of 82047861 in words is "eighty-two million, forty-seven thousand, eight hundred sixty-one".