685812972683 has 2 divisors, whose sum is σ = 685812972684. Its totient is φ = 685812972682.

The previous prime is 685812972679. The next prime is 685812972697. The reversal of 685812972683 is 386279218586.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 685812972683 - 2² = 685812972679 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (685812972643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342906486341 + 342906486342.

It is an arithmetic number, because the mean of its divisors is an integer number (342906486342).

Almost surely, 2^685812972683 is an apocalyptic number.

685812972683 is a deficient number, since it is larger than the sum of its proper divisors (1).

685812972683 is an equidigital number, since it uses as much as digits as its factorization.

685812972683 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69672960, while the sum is 65.

The spelling of 685812972683 in words is "six hundred eighty-five billion, eight hundred twelve million, nine hundred seventy-two thousand, six hundred eighty-three".