685899319 has 16 divisors (see below), whose sum is σ = 796484416. Its totient is φ = 578534400.

The previous prime is 685899317. The next prime is 685899349. The reversal of 685899319 is 913998586.

It is a cyclic number.

It is not a de Polignac number, because 685899319 - 2¹ = 685899317 is a prime.

It is a super-2 number, since 2×685899319² = 940915751609327522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685899317) 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, 120109 + ... + 125689.

It is an arithmetic number, because the mean of its divisors is an integer number (49780276).

Almost surely, 2^685899319 is an apocalyptic number.

685899319 is a deficient number, since it is larger than the sum of its proper divisors (110585097).

685899319 is a wasteful number, since it uses less digits than its factorization.

685899319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5866.

The product of its digits is 4199040, while the sum is 58.

The square root of 685899319 is about 26189.6796276701. The cubic root of 685899319 is about 881.9015865191.

The spelling of 685899319 in words is "six hundred eighty-five million, eight hundred ninety-nine thousand, three hundred nineteen".