687277 has 2 divisors, whose sum is σ = 687278. Its totient is φ = 687276.

The previous prime is 687233. The next prime is 687289. The reversal of 687277 is 772786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 687241 + 36 = 829^2 + 6^2 .

It is a cyclic number.

It is not a de Polignac number, because 687277 - 2¹⁵ = 654509 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343638 + 343639.

It is an arithmetic number, because the mean of its divisors is an integer number (343639).

2⁶⁸⁷²⁷⁷ is an apocalyptic number.

It is an amenable number.

687277 is a deficient number, since it is larger than the sum of its proper divisors (1).

687277 is an equidigital number, since it uses as much as digits as its factorization.

687277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32928, while the sum is 37.

The square root of 687277 is about 829.0217126228. The cubic root of 687277 is about 88.2491647127.

The spelling of 687277 in words is "six hundred eighty-seven thousand, two hundred seventy-seven".