649277 has 2 divisors, whose sum is σ = 649278. Its totient is φ = 649276.

The previous prime is 649273. The next prime is 649279. The reversal of 649277 is 772946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 606841 + 42436 = 779^2 + 206^2 .

It is a cyclic number.

It is not a de Polignac number, because 649277 - 2² = 649273 is a prime.

Together with 649279, it forms a pair of twin primes.

It is a Chen prime.

It is a d-powerful number, because it can be written as 6² + 4² + 2⁷ + 9⁶ + 7 + 7⁶ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649273) 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, 324638 + 324639.

It is an arithmetic number, because the mean of its divisors is an integer number (324639).

2⁶⁴⁹²⁷⁷ is an apocalyptic number.

It is an amenable number.

649277 is a deficient number, since it is larger than the sum of its proper divisors (1).

649277 is an equidigital number, since it uses as much as digits as its factorization.

649277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 35.

The square root of 649277 is about 805.7772645092. Note that the first 3 decimals coincide. The cubic root of 649277 is about 86.5917811379.

The spelling of 649277 in words is "six hundred forty-nine thousand, two hundred seventy-seven".