685960043387 has 2 divisors, whose sum is σ = 685960043388. Its totient is φ = 685960043386.

The previous prime is 685960043299. The next prime is 685960043423. The reversal of 685960043387 is 783340069586.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-685960043387 is a prime.

It is a super-2 number, since 2×685960043387² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (685960043687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342980021693 + 342980021694.

It is an arithmetic number, because the mean of its divisors is an integer number (342980021694).

Almost surely, 2^685960043387 is an apocalyptic number.

685960043387 is a deficient number, since it is larger than the sum of its proper divisors (1).

685960043387 is an equidigital number, since it uses as much as digits as its factorization.

685960043387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26127360, while the sum is 59.

The spelling of 685960043387 in words is "six hundred eighty-five billion, nine hundred sixty million, forty-three thousand, three hundred eighty-seven".