685876211 has 4 divisors (see below), whose sum is σ = 685934352. Its totient is φ = 685818072.

The previous prime is 685876207. The next prime is 685876223. The reversal of 685876211 is 112678586.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 685876211 - 2² = 685876207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685876201) 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, 4391 + ... + 37296.

It is an arithmetic number, because the mean of its divisors is an integer number (171483588).

Almost surely, 2^685876211 is an apocalyptic number.

685876211 is a deficient number, since it is larger than the sum of its proper divisors (58141).

685876211 is a wasteful number, since it uses less digits than its factorization.

685876211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58140.

The product of its digits is 161280, while the sum is 44.

The square root of 685876211 is about 26189.2384578093. The cubic root of 685876211 is about 881.8916826308.

The spelling of 685876211 in words is "six hundred eighty-five million, eight hundred seventy-six thousand, two hundred eleven".