687046 has 8 divisors (see below), whose sum is σ = 1052640. Its totient is φ = 336168.

The previous prime is 687041. The next prime is 687061. The reversal of 687046 is 640786.

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

It is a super-2 number, since 2×687046² = 944064412232, which contains 22 as substring.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 686999 and 687017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687041) by changing a digit.

687046 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3561 + ... + 3748.

It is an arithmetic number, because the mean of its divisors is an integer number (131580).

2⁶⁸⁷⁰⁴⁶ is an apocalyptic number.

687046 is a deficient number, since it is larger than the sum of its proper divisors (365594).

687046 is a wasteful number, since it uses less digits than its factorization.

687046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7358.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 687046 is about 828.8823800757. The cubic root of 687046 is about 88.2392764913.

The spelling of 687046 in words is "six hundred eighty-seven thousand, forty-six".