677689 has 4 divisors (see below), whose sum is σ = 694260. Its totient is φ = 661120.

The previous prime is 677687. The next prime is 677717. The reversal of 677689 is 986776.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 308025 + 369664 = 555^2 + 608^2 .

It is a cyclic number.

It is not a de Polignac number, because 677689 - 2¹ = 677687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (677681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8224 + ... + 8305.

It is an arithmetic number, because the mean of its divisors is an integer number (173565).

2⁶⁷⁷⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

677689 is a deficient number, since it is larger than the sum of its proper divisors (16571).

677689 is a wasteful number, since it uses less digits than its factorization.

677689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16570.

The product of its digits is 127008, while the sum is 43.

The square root of 677689 is about 823.2186829756. The cubic root of 677689 is about 87.8368620112.

The spelling of 677689 in words is "six hundred seventy-seven thousand, six hundred eighty-nine".