687054 has 16 divisors (see below), whose sum is σ = 1406592. Its totient is φ = 223608.

The previous prime is 687041. The next prime is 687061. The reversal of 687054 is 450786.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

687054 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 1074 + ... + 1589.

It is an arithmetic number, because the mean of its divisors is an integer number (87912).

2⁶⁸⁷⁰⁵⁴ is an apocalyptic number.

687054 is an abundant number, since it is smaller than the sum of its proper divisors (719538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

687054 is a wasteful number, since it uses less digits than its factorization.

687054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2711.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 687054 is about 828.8872058368. The cubic root of 687054 is about 88.2396189776.

The spelling of 687054 in words is "six hundred eighty-seven thousand, fifty-four".