685280543 has 4 divisors (see below), whose sum is σ = 721347960. Its totient is φ = 649213128.

The previous prime is 685280521. The next prime is 685280567. The reversal of 685280543 is 345082586.

685280543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 685280543 - 2²⁰ = 684231967 is a prime.

It is a super-2 number, since 2×685280543² = 939218845228749698, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 685280543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685285543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18033680 + ... + 18033717.

It is an arithmetic number, because the mean of its divisors is an integer number (180336990).

Almost surely, 2^685280543 is an apocalyptic number.

685280543 is a deficient number, since it is larger than the sum of its proper divisors (36067417).

685280543 is a wasteful number, since it uses less digits than its factorization.

685280543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36067416.

The product of its (nonzero) digits is 230400, while the sum is 41.

The square root of 685280543 is about 26177.8636064901. The cubic root of 685280543 is about 881.6363076839.

The spelling of 685280543 in words is "six hundred eighty-five million, two hundred eighty thousand, five hundred forty-three".