685757992343 has 2 divisors, whose sum is σ = 685757992344. Its totient is φ = 685757992342.

The previous prime is 685757992319. The next prime is 685757992351. The reversal of 685757992343 is 343299757586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 685757992343 - 2¹⁰ = 685757991319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685757992303) 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, 342878996171 + 342878996172.

It is an arithmetic number, because the mean of its divisors is an integer number (342878996172).

Almost surely, 2^685757992343 is an apocalyptic number.

685757992343 is a deficient number, since it is larger than the sum of its proper divisors (1).

685757992343 is an equidigital number, since it uses as much as digits as its factorization.

685757992343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 342921600, while the sum is 68.

The spelling of 685757992343 in words is "six hundred eighty-five billion, seven hundred fifty-seven million, nine hundred ninety-two thousand, three hundred forty-three".