82105779 has 8 divisors (see below), whose sum is σ = 125113600. Its totient is φ = 46917576.

The previous prime is 82105769. The next prime is 82105781. The reversal of 82105779 is 97750128.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 82105779 - 2⁷ = 82105651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82105759) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1954879 + ... + 1954920.

It is an arithmetic number, because the mean of its divisors is an integer number (15639200).

Almost surely, 2^82105779 is an apocalyptic number.

82105779 is a deficient number, since it is larger than the sum of its proper divisors (43007821).

82105779 is a wasteful number, since it uses less digits than its factorization.

82105779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3909809.

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 82105779 is about 9061.2239239520. The cubic root of 82105779 is about 434.6348792443.

The spelling of 82105779 in words is "eighty-two million, one hundred five thousand, seven hundred seventy-nine".