649487 has 2 divisors, whose sum is σ = 649488. Its totient is φ = 649486.

The previous prime is 649483. The next prime is 649499. The reversal of 649487 is 784946.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 649487 - 2² = 649483 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 649487.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 649487.

It is not a weakly prime, because it can be changed into another prime (649483) 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, 324743 + 324744.

It is an arithmetic number, because the mean of its divisors is an integer number (324744).

2⁶⁴⁹⁴⁸⁷ is an apocalyptic number.

649487 is a deficient number, since it is larger than the sum of its proper divisors (1).

649487 is an equidigital number, since it uses as much as digits as its factorization.

649487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 649487 is about 805.9075629376. The cubic root of 649487 is about 86.6011157844.

The spelling of 649487 in words is "six hundred forty-nine thousand, four hundred eighty-seven".