826328857 has 2 divisors, whose sum is σ = 826328858. Its totient is φ = 826328856.

The previous prime is 826328851. The next prime is 826328873. The reversal of 826328857 is 758823628.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 657614736 + 168714121 = 25644^2 + 12989^2 .

It is a cyclic number.

It is not a de Polignac number, because 826328857 - 2¹⁹ = 825804569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 826328857.

It is not a weakly prime, because it can be changed into another prime (826328851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 413164428 + 413164429.

It is an arithmetic number, because the mean of its divisors is an integer number (413164429).

Almost surely, 2^826328857 is an apocalyptic number.

It is an amenable number.

826328857 is a deficient number, since it is larger than the sum of its proper divisors (1).

826328857 is an equidigital number, since it uses as much as digits as its factorization.

826328857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1290240, while the sum is 49.

The square root of 826328857 is about 28745.9363562922. The cubic root of 826328857 is about 938.3920211926.

The spelling of 826328857 in words is "eight hundred twenty-six million, three hundred twenty-eight thousand, eight hundred fifty-seven".