821327123 has 2 divisors, whose sum is σ = 821327124. Its totient is φ = 821327122.

The previous prime is 821327093. The next prime is 821327149. The reversal of 821327123 is 321723128.

821327123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 821327123 - 2¹⁶ = 821261587 is a prime.

It is not a weakly prime, because it can be changed into another prime (821327323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410663561 + 410663562.

It is an arithmetic number, because the mean of its divisors is an integer number (410663562).

Almost surely, 2^821327123 is an apocalyptic number.

821327123 is a deficient number, since it is larger than the sum of its proper divisors (1).

821327123 is an equidigital number, since it uses as much as digits as its factorization.

821327123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 29.

The square root of 821327123 is about 28658.8053309973. The cubic root of 821327123 is about 936.4948389584.

The spelling of 821327123 in words is "eight hundred twenty-one million, three hundred twenty-seven thousand, one hundred twenty-three".