821882087 has 16 divisors (see below), whose sum is σ = 896464800. Its totient is φ = 748973952.

The previous prime is 821881987. The next prime is 821882093. The reversal of 821882087 is 780288128.

It is a cyclic number.

It is not a de Polignac number, because 821882087 - 2¹⁰ = 821881063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821882987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 484613 + ... + 486305.

It is an arithmetic number, because the mean of its divisors is an integer number (56029050).

Almost surely, 2^821882087 is an apocalyptic number.

821882087 is a deficient number, since it is larger than the sum of its proper divisors (74582713).

821882087 is a wasteful number, since it uses less digits than its factorization.

821882087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2162.

The product of its (nonzero) digits is 114688, while the sum is 44.

The square root of 821882087 is about 28668.4859558366. The cubic root of 821882087 is about 936.7057187626.

The spelling of 821882087 in words is "eight hundred twenty-one million, eight hundred eighty-two thousand, eighty-seven".