687954 has 8 divisors (see below), whose sum is σ = 1375920. Its totient is φ = 229316.

The previous prime is 687949. The next prime is 687961. The reversal of 687954 is 459786.

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

687954 is an admirable number.

It is a super-2 number, since 2×687954² = 946561412232, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57324 + ... + 57335.

It is an arithmetic number, because the mean of its divisors is an integer number (171990).

2⁶⁸⁷⁹⁵⁴ is an apocalyptic number.

687954 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

687954 is a wasteful number, since it uses less digits than its factorization.

687954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114664.

The product of its digits is 60480, while the sum is 39.

The square root of 687954 is about 829.4299247073. The cubic root of 687954 is about 88.2781317222.

The spelling of 687954 in words is "six hundred eighty-seven thousand, nine hundred fifty-four".