686734 has 8 divisors (see below), whose sum is σ = 1074960. Its totient is φ = 328416.

The previous prime is 686731. The next prime is 686737. The reversal of 686734 is 437686.

It is an interprime number because it is at equal distance from previous prime (686731) and next prime (686737).

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

It is a self number, because there is not a number n which added to its sum of digits gives 686734.

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 3 ways as a sum of consecutive naturals, for example, 7419 + ... + 7510.

It is an arithmetic number, because the mean of its divisors is an integer number (134370).

2⁶⁸⁶⁷³⁴ is an apocalyptic number.

686734 is a deficient number, since it is larger than the sum of its proper divisors (388226).

686734 is a wasteful number, since it uses less digits than its factorization.

686734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14954.

The product of its digits is 24192, while the sum is 34.

The square root of 686734 is about 828.6941534728. The cubic root of 686734 is about 88.2259174524.

The spelling of 686734 in words is "six hundred eighty-six thousand, seven hundred thirty-four".