685822453 has 2 divisors, whose sum is σ = 685822454. Its totient is φ = 685822452.

The previous prime is 685822447. The next prime is 685822481. The reversal of 685822453 is 354228586.

685822453 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., 400280049 + 285542404 = 20007^2 + 16898^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-685822453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685822853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342911226 + 342911227.

It is an arithmetic number, because the mean of its divisors is an integer number (342911227).

Almost surely, 2^685822453 is an apocalyptic number.

It is an amenable number.

685822453 is a deficient number, since it is larger than the sum of its proper divisors (1).

685822453 is an equidigital number, since it uses as much as digits as its factorization.

685822453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 460800, while the sum is 43.

The square root of 685822453 is about 26188.2121001034. The cubic root of 685822453 is about 881.8686415577.

The spelling of 685822453 in words is "six hundred eighty-five million, eight hundred twenty-two thousand, four hundred fifty-three".