685534587 has 16 divisors (see below), whose sum is σ = 930378240. Its totient is φ = 448916832.

The previous prime is 685534583. The next prime is 685534609. The reversal of 685534587 is 785435586.

It is a happy number.

It is not a de Polignac number, because 685534587 - 2² = 685534583 is a prime.

It is not an unprimeable number, because it can be changed into a prime (685534583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39348 + ... + 54030.

It is an arithmetic number, because the mean of its divisors is an integer number (58148640).

Almost surely, 2^685534587 is an apocalyptic number.

685534587 is a deficient number, since it is larger than the sum of its proper divisors (244843653).

685534587 is a wasteful number, since it uses less digits than its factorization.

685534587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14962.

The product of its digits is 4032000, while the sum is 51.

The square root of 685534587 is about 26182.7154244933. The cubic root of 685534587 is about 881.7452395879.

Subtracting 685534587 from its reverse (785435586), we obtain a palindrome (99900999).

The spelling of 685534587 in words is "six hundred eighty-five million, five hundred thirty-four thousand, five hundred eighty-seven".