64384819 has 2 divisors, whose sum is σ = 64384820. Its totient is φ = 64384818.

The previous prime is 64384781. The next prime is 64384841. The reversal of 64384819 is 91848346.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64384819 - 2¹¹ = 64382771 is a prime.

It is a super-2 number, since 2×64384819² = 8290809835325522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64384849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32192409 + 32192410.

It is an arithmetic number, because the mean of its divisors is an integer number (32192410).

Almost surely, 2^64384819 is an apocalyptic number.

64384819 is a deficient number, since it is larger than the sum of its proper divisors (1).

64384819 is an equidigital number, since it uses as much as digits as its factorization.

64384819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 43.

The square root of 64384819 is about 8024.0151420595. The cubic root of 64384819 is about 400.8001047638.

The spelling of 64384819 in words is "sixty-four million, three hundred eighty-four thousand, eight hundred nineteen".