685809274 has 16 divisors (see below), whose sum is σ = 1107691200. Its totient is φ = 317262784.

The previous prime is 685809263. The next prime is 685809277. The reversal of 685809274 is 472908586.

685809274 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (685809277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168934 + ... + 172945.

It is an arithmetic number, because the mean of its divisors is an integer number (69230700).

Almost surely, 2^685809274 is an apocalyptic number.

685809274 is a deficient number, since it is larger than the sum of its proper divisors (421881926).

685809274 is a wasteful number, since it uses less digits than its factorization.

685809274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341957.

The product of its (nonzero) digits is 967680, while the sum is 49.

The square root of 685809274 is about 26187.9604780517. The cubic root of 685809274 is about 881.8629927579.

The spelling of 685809274 in words is "six hundred eighty-five million, eight hundred nine thousand, two hundred seventy-four".