685065213 has 24 divisors (see below), whose sum is σ = 1134501888. Its totient is φ = 390219552.

The previous prime is 685065209. The next prime is 685065221. The reversal of 685065213 is 312560586.

It is not a de Polignac number, because 685065213 - 2² = 685065209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685065413) 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 23 ways as a sum of consecutive naturals, for example, 2820 + ... + 37122.

It is an arithmetic number, because the mean of its divisors is an integer number (47270912).

Almost surely, 2^685065213 is an apocalyptic number.

685065213 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

685065213 is a deficient number, since it is larger than the sum of its proper divisors (449436675).

685065213 is a wasteful number, since it uses less digits than its factorization.

685065213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34633 (or 34630 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 685065213 is about 26173.7504572807. The cubic root of 685065213 is about 881.5439549311.

The spelling of 685065213 in words is "six hundred eighty-five million, sixty-five thousand, two hundred thirteen".