82580779 has 4 divisors (see below), whose sum is σ = 82662840. Its totient is φ = 82498720.

The previous prime is 82580753. The next prime is 82580789. The reversal of 82580779 is 97708528.

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 82580779 - 2⁷ = 82580651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82580749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39502 + ... + 41539.

It is an arithmetic number, because the mean of its divisors is an integer number (20665710).

Almost surely, 2^82580779 is an apocalyptic number.

82580779 is a deficient number, since it is larger than the sum of its proper divisors (82061).

82580779 is a wasteful number, since it uses less digits than its factorization.

82580779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82060.

The product of its (nonzero) digits is 282240, while the sum is 46.

The square root of 82580779 is about 9087.3967119302. The cubic root of 82580779 is about 435.4714209275.

The spelling of 82580779 in words is "eighty-two million, five hundred eighty thousand, seven hundred seventy-nine".