686411 has 4 divisors (see below), whose sum is σ = 748824. Its totient is φ = 624000.

The previous prime is 686363. The next prime is 686417. The reversal of 686411 is 114686.

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 686411 - 2¹⁸ = 424267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (686417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31190 + ... + 31211.

It is an arithmetic number, because the mean of its divisors is an integer number (187206).

2⁶⁸⁶⁴¹¹ is an apocalyptic number.

686411 is a deficient number, since it is larger than the sum of its proper divisors (62413).

686411 is a wasteful number, since it uses less digits than its factorization.

686411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62412.

The product of its digits is 1152, while the sum is 26.

The square root of 686411 is about 828.4992456243. The cubic root of 686411 is about 88.2120831583.

The spelling of 686411 in words is "six hundred eighty-six thousand, four hundred eleven".