678877 has 4 divisors (see below), whose sum is σ = 691740. Its totient is φ = 666016.

The previous prime is 678871. The next prime is 678883. The reversal of 678877 is 778876.

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

It is an interprime number because it is at equal distance from previous prime (678871) and next prime (678883).

It can be written as a sum of positive squares in 2 ways, for example, as 352836 + 326041 = 594^2 + 571^2 .

It is a cyclic number.

It is not a de Polignac number, because 678877 - 2⁷ = 678749 is a prime.

It is a super-2 number, since 2×678877² = 921747962258, which contains 22 as substring.

It is a Duffinian number.

678877 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678871) 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 in 3 ways as a sum of consecutive naturals, for example, 6352 + ... + 6457.

It is an arithmetic number, because the mean of its divisors is an integer number (172935).

2⁶⁷⁸⁸⁷⁷ is an apocalyptic number.

It is an amenable number.

678877 is a deficient number, since it is larger than the sum of its proper divisors (12863).

678877 is a wasteful number, since it uses less digits than its factorization.

678877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12862.

The product of its digits is 131712, while the sum is 43.

The square root of 678877 is about 823.9399249945. The cubic root of 678877 is about 87.8881585379. Note that the first 3 decimals are identical.

Subtracting 678877 from its reverse (778876), we obtain a palindrome (99999).

The spelling of 678877 in words is "six hundred seventy-eight thousand, eight hundred seventy-seven".