82821853 has 2 divisors, whose sum is σ = 82821854. Its totient is φ = 82821852.

The previous prime is 82821829. The next prime is 82821857. The reversal of 82821853 is 35812828.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58644964 + 24176889 = 7658^2 + 4917^2 .

It is a cyclic number.

It is not a de Polignac number, because 82821853 - 2⁹ = 82821341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82821857) by changing a digit.

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 as a sum of consecutive naturals, namely, 41410926 + 41410927.

It is an arithmetic number, because the mean of its divisors is an integer number (41410927).

Almost surely, 2^82821853 is an apocalyptic number.

It is an amenable number.

82821853 is a deficient number, since it is larger than the sum of its proper divisors (1).

82821853 is an equidigital number, since it uses as much as digits as its factorization.

82821853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30720, while the sum is 37.

The square root of 82821853 is about 9100.6512404333. The cubic root of 82821853 is about 435.8947593396.

The spelling of 82821853 in words is "eighty-two million, eight hundred twenty-one thousand, eight hundred fifty-three".