219300649 has 2 divisors, whose sum is σ = 219300650. Its totient is φ = 219300648.

The previous prime is 219300647. The next prime is 219300667. The reversal of 219300649 is 946003912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135303424 + 83997225 = 11632^2 + 9165^2 .

It is a cyclic number.

It is not a de Polignac number, because 219300649 - 2¹ = 219300647 is a prime.

Together with 219300647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (219300643) 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, 109650324 + 109650325.

It is an arithmetic number, because the mean of its divisors is an integer number (109650325).

Almost surely, 2^219300649 is an apocalyptic number.

It is an amenable number.

219300649 is a deficient number, since it is larger than the sum of its proper divisors (1).

219300649 is an equidigital number, since it uses as much as digits as its factorization.

219300649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 219300649 is about 14808.8030914048. The cubic root of 219300649 is about 603.0407204812.

The spelling of 219300649 in words is "two hundred nineteen million, three hundred thousand, six hundred forty-nine".