687307 has 2 divisors, whose sum is σ = 687308. Its totient is φ = 687306.

The previous prime is 687299. The next prime is 687311. The reversal of 687307 is 703786.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 687307 - 2³ = 687299 is a prime.

It is not a weakly prime, because it can be changed into another prime (687317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343653 + 343654.

It is an arithmetic number, because the mean of its divisors is an integer number (343654).

2⁶⁸⁷³⁰⁷ is an apocalyptic number.

687307 is a deficient number, since it is larger than the sum of its proper divisors (1).

687307 is an equidigital number, since it uses as much as digits as its factorization.

687307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 687307 is about 829.0398060407. The cubic root of 687307 is about 88.2504487347.

The spelling of 687307 in words is "six hundred eighty-seven thousand, three hundred seven".