685424043 has 24 divisors (see below), whose sum is σ = 1034342400. Its totient is φ = 436866480.

The previous prime is 685424039. The next prime is 685424053. The reversal of 685424043 is 340424586.

It is not a de Polignac number, because 685424043 - 2² = 685424039 is a prime.

It is a super-2 number, since 2×685424043² = 939612237444931698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 685423989 and 685424007.

It is not an unprimeable number, because it can be changed into a prime (685424053) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8358 + ... + 37956.

It is an arithmetic number, because the mean of its divisors is an integer number (43097600).

Almost surely, 2^685424043 is an apocalyptic number.

685424043 is a deficient number, since it is larger than the sum of its proper divisors (348918357).

685424043 is a wasteful number, since it uses less digits than its factorization.

685424043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29719 (or 29716 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

The square root of 685424043 is about 26180.6043283955. The cubic root of 685424043 is about 881.6978425699.

The spelling of 685424043 in words is "six hundred eighty-five million, four hundred twenty-four thousand, forty-three".