823069609 has 2 divisors, whose sum is σ = 823069610. Its totient is φ = 823069608.

The previous prime is 823069589. The next prime is 823069627. The reversal of 823069609 is 906960328.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 606538384 + 216531225 = 24628^2 + 14715^2 .

It is a cyclic number.

It is not a de Polignac number, because 823069609 - 2²³ = 814681001 is a prime.

It is not a weakly prime, because it can be changed into another prime (823069109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411534804 + 411534805.

It is an arithmetic number, because the mean of its divisors is an integer number (411534805).

Almost surely, 2^823069609 is an apocalyptic number.

It is an amenable number.

823069609 is a deficient number, since it is larger than the sum of its proper divisors (1).

823069609 is an equidigital number, since it uses as much as digits as its factorization.

823069609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 823069609 is about 28689.1897585136. The cubic root of 823069609 is about 937.1566444910.

The spelling of 823069609 in words is "eight hundred twenty-three million, sixty-nine thousand, six hundred nine".