82605779 has 8 divisors (see below), whose sum is σ = 83699568. Its totient is φ = 81517600.

The previous prime is 82605769. The next prime is 82605791. The reversal of 82605779 is 97750628.

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

It is a cyclic number.

It is not a de Polignac number, because 82605779 - 2⁴ = 82605763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82605739) 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, 33869 + ... + 36225.

It is an arithmetic number, because the mean of its divisors is an integer number (10462446).

Almost surely, 2^82605779 is an apocalyptic number.

82605779 is a deficient number, since it is larger than the sum of its proper divisors (1093789).

82605779 is a wasteful number, since it uses less digits than its factorization.

82605779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2805.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 82605779 is about 9088.7721392936. The cubic root of 82605779 is about 435.5153604788.

The spelling of 82605779 in words is "eighty-two million, six hundred five thousand, seven hundred seventy-nine".