685316499 has 48 divisors (see below), whose sum is σ = 1095494400. Its totient is φ = 379753920.

The previous prime is 685316497. The next prime is 685316501. The reversal of 685316499 is 994613586.

It is an interprime number because it is at equal distance from previous prime (685316497) and next prime (685316501).

It is not a de Polignac number, because 685316499 - 2¹ = 685316497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (685316497) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1143802 + ... + 1144400.

It is an arithmetic number, because the mean of its divisors is an integer number (22822800).

Almost surely, 2^685316499 is an apocalyptic number.

685316499 is a deficient number, since it is larger than the sum of its proper divisors (410177901).

685316499 is a wasteful number, since it uses less digits than its factorization.

685316499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840 (or 833 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 51.

The square root of 685316499 is about 26178.5503609348. The cubic root of 685316499 is about 881.6517269459.

The spelling of 685316499 in words is "six hundred eighty-five million, three hundred sixteen thousand, four hundred ninety-nine".