82870811 has 2 divisors, whose sum is σ = 82870812. Its totient is φ = 82870810.

The previous prime is 82870807. The next prime is 82870829. The reversal of 82870811 is 11807828.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82870811 - 2² = 82870807 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (82870831) 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 as a sum of consecutive naturals, namely, 41435405 + 41435406.

It is an arithmetic number, because the mean of its divisors is an integer number (41435406).

Almost surely, 2^82870811 is an apocalyptic number.

82870811 is a deficient number, since it is larger than the sum of its proper divisors (1).

82870811 is an equidigital number, since it uses as much as digits as its factorization.

82870811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7168, while the sum is 35.

The square root of 82870811 is about 9103.3406505524. The cubic root of 82870811 is about 435.9806317323.

The spelling of 82870811 in words is "eighty-two million, eight hundred seventy thousand, eight hundred eleven".