685268954269 has 2 divisors, whose sum is σ = 685268954270. Its totient is φ = 685268954268.

The previous prime is 685268954243. The next prime is 685268954297. The reversal of 685268954269 is 962459862586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 455024448025 + 230244506244 = 674555^2 + 479838^2 .

It is a cyclic number.

It is not a de Polignac number, because 685268954269 - 2²⁷ = 685134736541 is a prime.

It is a super-2 number, since 2×685268954269² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 685268954198 and 685268954207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685260954269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342634477134 + 342634477135.

It is an arithmetic number, because the mean of its divisors is an integer number (342634477135).

Almost surely, 2^685268954269 is an apocalyptic number.

It is an amenable number.

685268954269 is a deficient number, since it is larger than the sum of its proper divisors (1).

685268954269 is an equidigital number, since it uses as much as digits as its factorization.

685268954269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 447897600, while the sum is 70.

The spelling of 685268954269 in words is "six hundred eighty-five billion, two hundred sixty-eight million, nine hundred fifty-four thousand, two hundred sixty-nine".