685369599 has 16 divisors (see below), whose sum is σ = 934581120. Its totient is φ = 446640480.

The previous prime is 685369591. The next prime is 685369639. The reversal of 685369599 is 995963586.

It is not a de Polignac number, because 685369599 - 2³ = 685369591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685369591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13317 + ... + 39345.

It is an arithmetic number, because the mean of its divisors is an integer number (58411320).

Almost surely, 2^685369599 is an apocalyptic number.

685369599 is a deficient number, since it is larger than the sum of its proper divisors (249211521).

685369599 is a wasteful number, since it uses less digits than its factorization.

685369599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26230.

The product of its digits is 15746400, while the sum is 60.

The square root of 685369599 is about 26179.5645303737. The cubic root of 685369599 is about 881.6744972025.

The spelling of 685369599 in words is "six hundred eighty-five million, three hundred sixty-nine thousand, five hundred ninety-nine".