685368669 has 16 divisors (see below), whose sum is σ = 940996224. Its totient is φ = 443443200.

The previous prime is 685368659. The next prime is 685368683. The reversal of 685368669 is 966863586.

It is not a de Polignac number, because 685368669 - 2⁵ = 685368637 is a prime.

It is a super-2 number, since 2×685368669² = 939460424893663122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685368659) 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, 9304 + ... + 38174.

It is an arithmetic number, because the mean of its divisors is an integer number (58812264).

Almost surely, 2^685368669 is an apocalyptic number.

It is an amenable number.

685368669 is a deficient number, since it is larger than the sum of its proper divisors (255627555).

685368669 is a wasteful number, since it uses less digits than its factorization.

685368669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29108.

The product of its digits is 11197440, while the sum is 57.

The square root of 685368669 is about 26179.5467684221. The cubic root of 685368669 is about 881.6740984115.

The spelling of 685368669 in words is "six hundred eighty-five million, three hundred sixty-eight thousand, six hundred sixty-nine".