821050427 has 2 divisors, whose sum is σ = 821050428. Its totient is φ = 821050426.

The previous prime is 821050409. The next prime is 821050459. The reversal of 821050427 is 724050128.

821050427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 821050427 - 2⁸ = 821050171 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 821050427.

It is not a weakly prime, because it can be changed into another prime (821050327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410525213 + 410525214.

It is an arithmetic number, because the mean of its divisors is an integer number (410525214).

Almost surely, 2^821050427 is an apocalyptic number.

821050427 is a deficient number, since it is larger than the sum of its proper divisors (1).

821050427 is an equidigital number, since it uses as much as digits as its factorization.

821050427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 821050427 is about 28653.9775074945. The cubic root of 821050427 is about 936.3896622377.

The spelling of 821050427 in words is "eight hundred twenty-one million, fifty thousand, four hundred twenty-seven".