821068429 has 2 divisors, whose sum is σ = 821068430. Its totient is φ = 821068428.

The previous prime is 821068411. The next prime is 821068433. The reversal of 821068429 is 924860128.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 796763529 + 24304900 = 28227^2 + 4930^2 .

It is a cyclic number.

It is not a de Polignac number, because 821068429 - 2¹⁷ = 820937357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 821068391 and 821068400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (821063429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410534214 + 410534215.

It is an arithmetic number, because the mean of its divisors is an integer number (410534215).

Almost surely, 2^821068429 is an apocalyptic number.

It is an amenable number.

821068429 is a deficient number, since it is larger than the sum of its proper divisors (1).

821068429 is an equidigital number, since it uses as much as digits as its factorization.

821068429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 821068429 is about 28654.2916331917. The cubic root of 821068429 is about 936.3965058139.

The spelling of 821068429 in words is "eight hundred twenty-one million, sixty-eight thousand, four hundred twenty-nine".