649858219 has 2 divisors, whose sum is σ = 649858220. Its totient is φ = 649858218.

The previous prime is 649858217. The next prime is 649858229. The reversal of 649858219 is 912858946.

649858219 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 649858219 - 2¹ = 649858217 is a prime.

It is a super-3 number, since 3×649858219³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 649858217, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (649858217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324929109 + 324929110.

It is an arithmetic number, because the mean of its divisors is an integer number (324929110).

Almost surely, 2^649858219 is an apocalyptic number.

649858219 is a deficient number, since it is larger than the sum of its proper divisors (1).

649858219 is an equidigital number, since it uses as much as digits as its factorization.

649858219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1244160, while the sum is 52.

The square root of 649858219 is about 25492.3168621450. The cubic root of 649858219 is about 866.1761180704.

The spelling of 649858219 in words is "six hundred forty-nine million, eight hundred fifty-eight thousand, two hundred nineteen".