82687705 has 4 divisors (see below), whose sum is σ = 99225252. Its totient is φ = 66150160.

The previous prime is 82687681. The next prime is 82687721. The reversal of 82687705 is 50778628.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 54523456 + 28164249 = 7384^2 + 5307^2 .

It is not a de Polignac number, because 82687705 - 2⁵ = 82687673 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8268766 + ... + 8268775.

It is an arithmetic number, because the mean of its divisors is an integer number (24806313).

Almost surely, 2^82687705 is an apocalyptic number.

It is an amenable number.

82687705 is a deficient number, since it is larger than the sum of its proper divisors (16537547).

82687705 is a wasteful number, since it uses less digits than its factorization.

82687705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16537546.

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 82687705 is about 9093.2780118063. The cubic root of 82687705 is about 435.6592900475.

The spelling of 82687705 in words is "eighty-two million, six hundred eighty-seven thousand, seven hundred five".