684164311 has 4 divisors (see below), whose sum is σ = 688119192. Its totient is φ = 680209432.

The previous prime is 684164309. The next prime is 684164329. The reversal of 684164311 is 113461486.

684164311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113461486 = 2 ⋅56730743.

It is a cyclic number.

It is not a de Polignac number, because 684164311 - 2¹ = 684164309 is a prime.

It is a super-2 number, since 2×684164311² = 936161608892209442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684164381) 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, 1977181 + ... + 1977526.

It is an arithmetic number, because the mean of its divisors is an integer number (172029798).

Almost surely, 2^684164311 is an apocalyptic number.

684164311 is a deficient number, since it is larger than the sum of its proper divisors (3954881).

684164311 is a wasteful number, since it uses less digits than its factorization.

684164311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3954880.

The product of its digits is 13824, while the sum is 34.

The square root of 684164311 is about 26156.5347666697. The cubic root of 684164311 is about 881.1573576237.

It can be divided in two parts, 68416 and 4311, that added together give a palindrome (72727).

The spelling of 684164311 in words is "six hundred eighty-four million, one hundred sixty-four thousand, three hundred eleven".