685271943 has 12 divisors (see below), whose sum is σ = 1023969960. Its totient is φ = 441094416.

The previous prime is 685271929. The next prime is 685271953. The reversal of 685271943 is 349172586.

685271943 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 685271943 - 2⁸ = 685271687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685271903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1312521 + ... + 1313042.

It is an arithmetic number, because the mean of its divisors is an integer number (85330830).

Almost surely, 2^685271943 is an apocalyptic number.

685271943 is a deficient number, since it is larger than the sum of its proper divisors (338698017).

685271943 is a wasteful number, since it uses less digits than its factorization.

685271943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2625598 (or 2625595 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 685271943 is about 26177.6993450532. The cubic root of 685271943 is about 881.6326196061.

The spelling of 685271943 in words is "six hundred eighty-five million, two hundred seventy-one thousand, nine hundred forty-three".