685211411 has 4 divisors (see below), whose sum is σ = 685304400. Its totient is φ = 685118424.

The previous prime is 685211389. The next prime is 685211437. The reversal of 685211411 is 114112586.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 685211411 - 2⁶ = 685211347 is a prime.

It is a super-2 number, since 2×685211411² = 939029355529221842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685211711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34391 + ... + 50528.

It is an arithmetic number, because the mean of its divisors is an integer number (171326100).

Almost surely, 2^685211411 is an apocalyptic number.

685211411 is a deficient number, since it is larger than the sum of its proper divisors (92989).

685211411 is an equidigital number, since it uses as much as digits as its factorization.

685211411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92988.

The product of its digits is 1920, while the sum is 29.

The square root of 685211411 is about 26176.5431445789. The cubic root of 685211411 is about 881.6066598112.

Adding to 685211411 its reverse (114112586), we get a palindrome (799323997).

The spelling of 685211411 in words is "six hundred eighty-five million, two hundred eleven thousand, four hundred eleven".