685534073 has 4 divisors (see below), whose sum is σ = 783467520. Its totient is φ = 587600628.

The previous prime is 685534037. The next prime is 685534097. The reversal of 685534073 is 370435586.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 685534073 - 2¹⁸ = 685271929 is a prime.

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 685534073.

It is not an unprimeable number, because it can be changed into a prime (685534013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48966713 + ... + 48966726.

It is an arithmetic number, because the mean of its divisors is an integer number (195866880).

Almost surely, 2^685534073 is an apocalyptic number.

It is an amenable number.

685534073 is a deficient number, since it is larger than the sum of its proper divisors (97933447).

685534073 is an equidigital number, since it uses as much as digits as its factorization.

685534073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97933446.

The product of its (nonzero) digits is 302400, while the sum is 41.

The square root of 685534073 is about 26182.7056088556. The cubic root of 685534073 is about 881.7450192163.

The spelling of 685534073 in words is "six hundred eighty-five million, five hundred thirty-four thousand, seventy-three".