677647 has 2 divisors, whose sum is σ = 677648. Its totient is φ = 677646.

The previous prime is 677639. The next prime is 677657. The reversal of 677647 is 746776.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 677647 - 2³ = 677639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (677627) 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 as a sum of consecutive naturals, namely, 338823 + 338824.

It is an arithmetic number, because the mean of its divisors is an integer number (338824).

2⁶⁷⁷⁶⁴⁷ is an apocalyptic number.

677647 is a deficient number, since it is larger than the sum of its proper divisors (1).

677647 is an equidigital number, since it uses as much as digits as its factorization.

677647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49392, while the sum is 37.

The square root of 677647 is about 823.1931729552. The cubic root of 677647 is about 87.8350474009.

The spelling of 677647 in words is "six hundred seventy-seven thousand, six hundred forty-seven".