684342311 has 4 divisors (see below), whose sum is σ = 685228392. Its totient is φ = 683456232.

The previous prime is 684342301. The next prime is 684342349. The reversal of 684342311 is 113243486.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-684342311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684342301) 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, 441881 + ... + 443426.

It is an arithmetic number, because the mean of its divisors is an integer number (171307098).

Almost surely, 2^684342311 is an apocalyptic number.

684342311 is a deficient number, since it is larger than the sum of its proper divisors (886081).

684342311 is an equidigital number, since it uses as much as digits as its factorization.

684342311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886080.

The product of its digits is 13824, while the sum is 32.

The square root of 684342311 is about 26159.9371367746. The cubic root of 684342311 is about 881.2337683176.

Adding to 684342311 its reverse (113243486), we get a palindrome (797585797).

The spelling of 684342311 in words is "six hundred eighty-four million, three hundred forty-two thousand, three hundred eleven".