685669343 has 2 divisors, whose sum is σ = 685669344. Its totient is φ = 685669342.

The previous prime is 685669339. The next prime is 685669349. The reversal of 685669343 is 343966586.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 685669343 - 2² = 685669339 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 685669291 and 685669300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685669349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342834671 + 342834672.

It is an arithmetic number, because the mean of its divisors is an integer number (342834672).

Almost surely, 2^685669343 is an apocalyptic number.

685669343 is a deficient number, since it is larger than the sum of its proper divisors (1).

685669343 is an equidigital number, since it uses as much as digits as its factorization.

685669343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 50.

The square root of 685669343 is about 26185.2886751321. The cubic root of 685669343 is about 881.8030108898.

The spelling of 685669343 in words is "six hundred eighty-five million, six hundred sixty-nine thousand, three hundred forty-three".