685977343 has 2 divisors, whose sum is σ = 685977344. Its totient is φ = 685977342.

The previous prime is 685977329. The next prime is 685977389. The reversal of 685977343 is 343779586.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-685977343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685974343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342988671 + 342988672.

It is an arithmetic number, because the mean of its divisors is an integer number (342988672).

Almost surely, 2^685977343 is an apocalyptic number.

685977343 is a deficient number, since it is larger than the sum of its proper divisors (1).

685977343 is an equidigital number, since it uses as much as digits as its factorization.

685977343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3810240, while the sum is 52.

The square root of 685977343 is about 26191.1691797064. The cubic root of 685977343 is about 881.9350252851.

The spelling of 685977343 in words is "six hundred eighty-five million, nine hundred seventy-seven thousand, three hundred forty-three".