687946 has 8 divisors (see below), whose sum is σ = 1179360. Its totient is φ = 294828.

The previous prime is 687931. The next prime is 687949. The reversal of 687946 is 649786.

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

It is a junction number, because it is equal to n+sod(n) for n = 687899 and 687908.

It is not an unprimeable number, because it can be changed into a prime (687949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24556 + ... + 24583.

It is an arithmetic number, because the mean of its divisors is an integer number (147420).

2⁶⁸⁷⁹⁴⁶ is an apocalyptic number.

687946 is a deficient number, since it is larger than the sum of its proper divisors (491414).

687946 is a wasteful number, since it uses less digits than its factorization.

687946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49148.

The product of its digits is 72576, while the sum is 40.

The square root of 687946 is about 829.4251021039. The cubic root of 687946 is about 88.2777895347.

The spelling of 687946 in words is "six hundred eighty-seven thousand, nine hundred forty-six".