685365927 has 16 divisors (see below), whose sum is σ = 935615712. Its totient is φ = 446123520.

The previous prime is 685365917. The next prime is 685365953. The reversal of 685365927 is 729563586.

It is a happy number.

It is not a de Polignac number, because 685365927 - 2²³ = 676977319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 685365927.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685365907) 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 15 ways as a sum of consecutive naturals, for example, 11403 + ... + 38739.

It is an arithmetic number, because the mean of its divisors is an integer number (58475982).

Almost surely, 2^685365927 is an apocalyptic number.

685365927 is a deficient number, since it is larger than the sum of its proper divisors (250249785).

685365927 is a wasteful number, since it uses less digits than its factorization.

685365927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27538.

The product of its digits is 2721600, while the sum is 51.

The square root of 685365927 is about 26179.4943992431. The cubic root of 685365927 is about 881.6729226192.

The spelling of 685365927 in words is "six hundred eighty-five million, three hundred sixty-five thousand, nine hundred twenty-seven".