65219849 has 2 divisors, whose sum is σ = 65219850. Its totient is φ = 65219848.

The previous prime is 65219821. The next prime is 65219851. The reversal of 65219849 is 94891256.

65219849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34339600 + 30880249 = 5860^2 + 5557^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65219849 is a prime.

Together with 65219851, 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 (65219899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32609924 + 32609925.

It is an arithmetic number, because the mean of its divisors is an integer number (32609925).

Almost surely, 2^65219849 is an apocalyptic number.

It is an amenable number.

65219849 is a deficient number, since it is larger than the sum of its proper divisors (1).

65219849 is an equidigital number, since it uses as much as digits as its factorization.

65219849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 44.

The square root of 65219849 is about 8075.8806950078. The cubic root of 65219849 is about 402.5253747361.

The spelling of 65219849 in words is "sixty-five million, two hundred nineteen thousand, eight hundred forty-nine".