686741 has 8 divisors (see below), whose sum is σ = 756000. Its totient is φ = 618640.

The previous prime is 686737. The next prime is 686761. The reversal of 686741 is 147686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 686741 - 2² = 686737 is a prime.

It is a super-2 number, since 2×686741² = 943226402162, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 686698 and 686707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686731) 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 7 ways as a sum of consecutive naturals, for example, 1430 + ... + 1848.

It is an arithmetic number, because the mean of its divisors is an integer number (94500).

2⁶⁸⁶⁷⁴¹ is an apocalyptic number.

It is an amenable number.

686741 is a deficient number, since it is larger than the sum of its proper divisors (69259).

686741 is a wasteful number, since it uses less digits than its factorization.

686741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579.

The product of its digits is 8064, while the sum is 32.

The square root of 686741 is about 828.6983769744. The cubic root of 686741 is about 88.2262172188.

The spelling of 686741 in words is "six hundred eighty-six thousand, seven hundred forty-one".