649499 has 2 divisors, whose sum is σ = 649500. Its totient is φ = 649498.

The previous prime is 649487. The next prime is 649501. The reversal of 649499 is 994946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 649499 - 2⁴ = 649483 is a prime.

Together with 649501, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (649469) 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, 324749 + 324750.

It is an arithmetic number, because the mean of its divisors is an integer number (324750).

2⁶⁴⁹⁴⁹⁹ is an apocalyptic number.

649499 is a deficient number, since it is larger than the sum of its proper divisors (1).

649499 is an equidigital number, since it uses as much as digits as its factorization.

649499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 41.

The square root of 649499 is about 805.9150079258. The cubic root of 649499 is about 86.6016491320.

The spelling of 649499 in words is "six hundred forty-nine thousand, four hundred ninety-nine".