821096959 has 2 divisors, whose sum is σ = 821096960. Its totient is φ = 821096958.

The previous prime is 821096917. The next prime is 821096999. The reversal of 821096959 is 959690128.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 821096959 - 2⁷ = 821096831 is a prime.

It is a Chen prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (821096999) 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, 410548479 + 410548480.

It is an arithmetic number, because the mean of its divisors is an integer number (410548480).

Almost surely, 2^821096959 is an apocalyptic number.

821096959 is a deficient number, since it is larger than the sum of its proper divisors (1).

821096959 is an equidigital number, since it uses as much as digits as its factorization.

821096959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 49.

The square root of 821096959 is about 28654.7894600536. The cubic root of 821096959 is about 936.4073514723.

The spelling of 821096959 in words is "eight hundred twenty-one million, ninety-six thousand, nine hundred fifty-nine".