687323 has 18 divisors (see below), whose sum is σ = 876204. Its totient is φ = 537264.

The previous prime is 687317. The next prime is 687331. The reversal of 687323 is 323786.

It is not a de Polignac number, because 687323 - 2⁴ = 687307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (687343) 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 17 ways as a sum of consecutive naturals, for example, 8240 + ... + 8322.

It is an arithmetic number, because the mean of its divisors is an integer number (48678).

2⁶⁸⁷³²³ is an apocalyptic number.

687323 is a deficient number, since it is larger than the sum of its proper divisors (188881).

687323 is a wasteful number, since it uses less digits than its factorization.

687323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 103 counting only the distinct ones).

The product of its digits is 6048, while the sum is 29.

The square root of 687323 is about 829.0494557021. The cubic root of 687323 is about 88.2511335312.

The spelling of 687323 in words is "six hundred eighty-seven thousand, three hundred twenty-three".