82785277 has 6 divisors (see below), whose sum is σ = 84757182. Its totient is φ = 80858232.

The previous prime is 82785271. The next prime is 82785289. The reversal of 82785277 is 77258728.

It can be written as a sum of positive squares in only one way, i.e., 75446596 + 7338681 = 8686^2 + 2709^2 .

It is not a de Polignac number, because 82785277 - 2⁷ = 82785149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82785271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20538 + ... + 24235.

It is an arithmetic number, because the mean of its divisors is an integer number (14126197).

Almost surely, 2^82785277 is an apocalyptic number.

It is an amenable number.

82785277 is a deficient number, since it is larger than the sum of its proper divisors (1971905).

82785277 is an equidigital number, since it uses as much as digits as its factorization.

82785277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44859 (or 44816 counting only the distinct ones).

The product of its digits is 439040, while the sum is 46.

The square root of 82785277 is about 9098.6414920031. The cubic root of 82785277 is about 435.8305829028.

The spelling of 82785277 in words is "eighty-two million, seven hundred eighty-five thousand, two hundred seventy-seven".