82706881 has 6 divisors (see below), whose sum is σ = 84775046. Its totient is φ = 80688000.

The previous prime is 82706863. The next prime is 82706893. The reversal of 82706881 is 18860728.

It can be written as a sum of positive squares in 3 ways, for example, as 14561856 + 68145025 = 3816^2 + 8255^2 .

It is not a de Polignac number, because 82706881 - 2¹¹ = 82704833 is a prime.

It is a super-2 number, since 2×82706881² = 13680856329496322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82706801) 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 5 ways as a sum of consecutive naturals, for example, 22920 + ... + 26281.

Almost surely, 2^82706881 is an apocalyptic number.

It is an amenable number.

82706881 is a deficient number, since it is larger than the sum of its proper divisors (2068165).

82706881 is an equidigital number, since it uses as much as digits as its factorization.

82706881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49283 (or 49242 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 82706881 is about 9094.3323559237. The cubic root of 82706881 is about 435.6929651742.

It can be divided in two parts, 8270 and 6881, that added together give a palindrome (15151).

The spelling of 82706881 in words is "eighty-two million, seven hundred six thousand, eight hundred eighty-one".