677812 has 12 divisors (see below), whose sum is σ = 1215396. Its totient is φ = 330560.

The previous prime is 677791. The next prime is 677813. The reversal of 677812 is 218776.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 234256 + 443556 = 484^2 + 666^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677813) 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, 1903 + ... + 2230.

It is an arithmetic number, because the mean of its divisors is an integer number (101283).

2⁶⁷⁷⁸¹² is an apocalyptic number.

It is an amenable number.

677812 is a deficient number, since it is larger than the sum of its proper divisors (537584).

677812 is a wasteful number, since it uses less digits than its factorization.

677812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4178 (or 4176 counting only the distinct ones).

The product of its digits is 4704, while the sum is 31.

The square root of 677812 is about 823.2933863454. The cubic root of 677812 is about 87.8421757960.

The spelling of 677812 in words is "six hundred seventy-seven thousand, eight hundred twelve".