82055779 has 4 divisors (see below), whose sum is σ = 88367776. Its totient is φ = 75743784.

The previous prime is 82055773. The next prime is 82055863. The reversal of 82055779 is 97755028.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82055779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82055773) 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, 3155979 + ... + 3156004.

It is an arithmetic number, because the mean of its divisors is an integer number (22091944).

Almost surely, 2^82055779 is an apocalyptic number.

82055779 is a deficient number, since it is larger than the sum of its proper divisors (6311997).

82055779 is a wasteful number, since it uses less digits than its factorization.

82055779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6311996.

The product of its (nonzero) digits is 176400, while the sum is 43.

The square root of 82055779 is about 9058.4644946039. The cubic root of 82055779 is about 434.5466347177.

The spelling of 82055779 in words is "eighty-two million, fifty-five thousand, seven hundred seventy-nine".