821447099383 has 2 divisors, whose sum is σ = 821447099384. Its totient is φ = 821447099382.

The previous prime is 821447099303. The next prime is 821447099441. The reversal of 821447099383 is 383990744128.

It is an a-pointer prime, because the next prime (821447099441) can be obtained adding 821447099383 to its sum of digits (58).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 821447099383 - 2¹⁷ = 821446968311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (821447099303) 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 as a sum of consecutive naturals, namely, 410723549691 + 410723549692.

It is an arithmetic number, because the mean of its divisors is an integer number (410723549692).

Almost surely, 2^821447099383 is an apocalyptic number.

821447099383 is a deficient number, since it is larger than the sum of its proper divisors (1).

821447099383 is an equidigital number, since it uses as much as digits as its factorization.

821447099383 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10450944, while the sum is 58.

The spelling of 821447099383 in words is "eight hundred twenty-one billion, four hundred forty-seven million, ninety-nine thousand, three hundred eighty-three".