676789 has 4 divisors (see below), whose sum is σ = 688320. Its totient is φ = 665260.

The previous prime is 676771. The next prime is 676807. The reversal of 676789 is 987676.

676789 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (676771) and next prime (676807).

It is a cyclic number.

It is not a de Polignac number, because 676789 - 2⁷ = 676661 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

676789 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (676289) 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, 5677 + ... + 5794.

It is an arithmetic number, because the mean of its divisors is an integer number (172080).

2⁶⁷⁶⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

676789 is a deficient number, since it is larger than the sum of its proper divisors (11531).

676789 is a wasteful number, since it uses less digits than its factorization.

676789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11530.

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

The square root of 676789 is about 822.6718665422. The cubic root of 676789 is about 87.7979610813.

The spelling of 676789 in words is "six hundred seventy-six thousand, seven hundred eighty-nine".