685268293 has 2 divisors, whose sum is σ = 685268294. Its totient is φ = 685268292.

The previous prime is 685268291. The next prime is 685268321. The reversal of 685268293 is 392862586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 673558209 + 11710084 = 25953^2 + 3422^2 .

It is a cyclic number.

It is not a de Polignac number, because 685268293 - 2¹ = 685268291 is a prime.

It is a super-2 number, since 2×685268293² = 939185266782267698, which contains 22 as substring.

Together with 685268291, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685268291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342634146 + 342634147.

It is an arithmetic number, because the mean of its divisors is an integer number (342634147).

Almost surely, 2^685268293 is an apocalyptic number.

It is an amenable number.

685268293 is a deficient number, since it is larger than the sum of its proper divisors (1).

685268293 is an equidigital number, since it uses as much as digits as its factorization.

685268293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 49.

The square root of 685268293 is about 26177.6296291318. The cubic root of 685268293 is about 881.6310543079.

The spelling of 685268293 in words is "six hundred eighty-five million, two hundred sixty-eight thousand, two hundred ninety-three".