684113211 has 12 divisors (see below), whose sum is σ = 993625360. Its totient is φ = 453554640.

The previous prime is 684113207. The next prime is 684113251. The reversal of 684113211 is 112311486.

It is a happy number.

It is not a de Polignac number, because 684113211 - 2² = 684113207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (684113251) 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 11 ways as a sum of consecutive naturals, for example, 208351 + ... + 211608.

Almost surely, 2^684113211 is an apocalyptic number.

684113211 is a deficient number, since it is larger than the sum of its proper divisors (309512149).

684113211 is a wasteful number, since it uses less digits than its factorization.

684113211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420146 (or 420143 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 684113211 is about 26155.5579370810. The cubic root of 684113211 is about 881.1354192962.

Adding to 684113211 its reverse (112311486), we get a palindrome (796424697).

The spelling of 684113211 in words is "six hundred eighty-four million, one hundred thirteen thousand, two hundred eleven".