823873769 has 2 divisors, whose sum is σ = 823873770. Its totient is φ = 823873768.

The previous prime is 823873753. The next prime is 823873793. The reversal of 823873769 is 967378328.

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., 743107600 + 80766169 = 27260^2 + 8987^2 .

It is a cyclic number.

It is not a de Polignac number, because 823873769 - 2⁴ = 823873753 is a prime.

It is a super-2 number, since 2×823873769² = 1357535974492530722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 823873769.

It is not a weakly prime, because it can be changed into another prime (823873069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411936884 + 411936885.

It is an arithmetic number, because the mean of its divisors is an integer number (411936885).

Almost surely, 2^823873769 is an apocalyptic number.

It is an amenable number.

823873769 is a deficient number, since it is larger than the sum of its proper divisors (1).

823873769 is an equidigital number, since it uses as much as digits as its factorization.

823873769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 53.

The square root of 823873769 is about 28703.2013719724. The cubic root of 823873769 is about 937.4617537938.

The spelling of 823873769 in words is "eight hundred twenty-three million, eight hundred seventy-three thousand, seven hundred sixty-nine".