685852943 has 4 divisors (see below), whose sum is σ = 686296128. Its totient is φ = 685409760.

The previous prime is 685852933. The next prime is 685852963. The reversal of 685852943 is 349258586.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 685852943 - 2¹⁰ = 685851919 is a prime.

It is a super-2 number, since 2×685852943² = 940788518843522498, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 685852891 and 685852900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685852933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219263 + ... + 222368.

It is an arithmetic number, because the mean of its divisors is an integer number (171574032).

Almost surely, 2^685852943 is an apocalyptic number.

685852943 is a deficient number, since it is larger than the sum of its proper divisors (443185).

685852943 is a wasteful number, since it uses less digits than its factorization.

685852943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443184.

The product of its digits is 2073600, while the sum is 50.

The square root of 685852943 is about 26188.7942257753. The cubic root of 685852943 is about 881.8817099431.

The spelling of 685852943 in words is "six hundred eighty-five million, eight hundred fifty-two thousand, nine hundred forty-three".