82756643 has 2 divisors, whose sum is σ = 82756644. Its totient is φ = 82756642.

The previous prime is 82756637. The next prime is 82756657. The reversal of 82756643 is 34665728.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82756643 - 2⁶ = 82756579 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82756643.

It is not a weakly prime, because it can be changed into another prime (82756693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41378321 + 41378322.

It is an arithmetic number, because the mean of its divisors is an integer number (41378322).

Almost surely, 2^82756643 is an apocalyptic number.

82756643 is a deficient number, since it is larger than the sum of its proper divisors (1).

82756643 is an equidigital number, since it uses as much as digits as its factorization.

82756643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 41.

The square root of 82756643 is about 9097.0678243047. The cubic root of 82756643 is about 435.7803283468.

The spelling of 82756643 in words is "eighty-two million, seven hundred fifty-six thousand, six hundred forty-three".