686054 has 16 divisors (see below), whose sum is σ = 1079808. Its totient is φ = 326592.

The previous prime is 686051. The next prime is 686057. The reversal of 686054 is 450686.

It is an interprime number because it is at equal distance from previous prime (686051) and next prime (686057).

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 686054.

It is not an unprimeable number, because it can be changed into a prime (686051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5339 + ... + 5465.

It is an arithmetic number, because the mean of its divisors is an integer number (67488).

2⁶⁸⁶⁰⁵⁴ is an apocalyptic number.

686054 is a deficient number, since it is larger than the sum of its proper divisors (393754).

686054 is a wasteful number, since it uses less digits than its factorization.

686054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 686054 is about 828.2837677994. The cubic root of 686054 is about 88.1967875726.

The spelling of 686054 in words is "six hundred eighty-six thousand, fifty-four".