685872972427 has 2 divisors, whose sum is σ = 685872972428. Its totient is φ = 685872972426.

The previous prime is 685872972397. The next prime is 685872972451. The reversal of 685872972427 is 724279278586.

685872972427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 685872972427 - 2¹¹ = 685872970379 is a prime.

It is not a weakly prime, because it can be changed into another prime (685872972457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342936486213 + 342936486214.

It is an arithmetic number, because the mean of its divisors is an integer number (342936486214).

Almost surely, 2^685872972427 is an apocalyptic number.

685872972427 is a deficient number, since it is larger than the sum of its proper divisors (1).

685872972427 is an equidigital number, since it uses as much as digits as its factorization.

685872972427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 189665280, while the sum is 67.

The spelling of 685872972427 in words is "six hundred eighty-five billion, eight hundred seventy-two million, nine hundred seventy-two thousand, four hundred twenty-seven".