677687 has 2 divisors, whose sum is σ = 677688. Its totient is φ = 677686.

The previous prime is 677683. The next prime is 677717. The reversal of 677687 is 786776.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 677687 - 2² = 677683 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 (677681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338843 + 338844.

It is an arithmetic number, because the mean of its divisors is an integer number (338844).

2⁶⁷⁷⁶⁸⁷ is an apocalyptic number.

677687 is a deficient number, since it is larger than the sum of its proper divisors (1).

677687 is an equidigital number, since it uses as much as digits as its factorization.

677687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 98784, while the sum is 41.

The square root of 677687 is about 823.2174682306. The cubic root of 677687 is about 87.8367756029.

The spelling of 677687 in words is "six hundred seventy-seven thousand, six hundred eighty-seven".