827643469 has 2 divisors, whose sum is σ = 827643470. Its totient is φ = 827643468.

The previous prime is 827643461. The next prime is 827643493. The reversal of 827643469 is 964346728.

827643469 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 can be written as a sum of positive squares in only one way, i.e., 434097225 + 393546244 = 20835^2 + 19838^2 .

It is a cyclic number.

It is not a de Polignac number, because 827643469 - 2³ = 827643461 is a prime.

It is a super-2 number, since 2×827643469² = 1369987423556707922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (827643461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 413821734 + 413821735.

It is an arithmetic number, because the mean of its divisors is an integer number (413821735).

Almost surely, 2^827643469 is an apocalyptic number.

It is an amenable number.

827643469 is a deficient number, since it is larger than the sum of its proper divisors (1).

827643469 is an equidigital number, since it uses as much as digits as its factorization.

827643469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 49.

The square root of 827643469 is about 28768.7933184553. The cubic root of 827643469 is about 938.8893888716.

The spelling of 827643469 in words is "eight hundred twenty-seven million, six hundred forty-three thousand, four hundred sixty-nine".