677641 has 4 divisors (see below), whose sum is σ = 681732. Its totient is φ = 673552.

The previous prime is 677639. The next prime is 677647. The reversal of 677641 is 146776.

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 585225 + 92416 = 765^2 + 304^2 .

It is a cyclic number.

It is not a de Polignac number, because 677641 - 2¹ = 677639 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (677647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1786 + ... + 2131.

It is an arithmetic number, because the mean of its divisors is an integer number (170433).

2⁶⁷⁷⁶⁴¹ is an apocalyptic number.

It is an amenable number.

677641 is a deficient number, since it is larger than the sum of its proper divisors (4091).

677641 is a wasteful number, since it uses less digits than its factorization.

677641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4090.

The product of its digits is 7056, while the sum is 31.

The square root of 677641 is about 823.1895286020. The cubic root of 677641 is about 87.8347881647.

The spelling of 677641 in words is "six hundred seventy-seven thousand, six hundred forty-one".