687773 has 2 divisors, whose sum is σ = 687774. Its totient is φ = 687772.

The previous prime is 687767. The next prime is 687779. The reversal of 687773 is 377786.

It is a balanced prime because it is at equal distance from previous prime (687767) and next prime (687779).

It can be written as a sum of positive squares in only one way, i.e., 683929 + 3844 = 827^2 + 62^2 .

It is a cyclic number.

It is not a de Polignac number, because 687773 - 2⁸ = 687517 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687779) 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 as a sum of consecutive naturals, namely, 343886 + 343887.

It is an arithmetic number, because the mean of its divisors is an integer number (343887).

2⁶⁸⁷⁷⁷³ is an apocalyptic number.

It is an amenable number.

687773 is a deficient number, since it is larger than the sum of its proper divisors (1).

687773 is an equidigital number, since it uses as much as digits as its factorization.

687773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49392, while the sum is 38.

The square root of 687773 is about 829.3208064434. The cubic root of 687773 is about 88.2703890808.

The spelling of 687773 in words is "six hundred eighty-seven thousand, seven hundred seventy-three".