768816219 has 4 divisors (see below), whose sum is σ = 1025088296. Its totient is φ = 512544144.

The previous prime is 768816163. The next prime is 768816227. The reversal of 768816219 is 912618867.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 912618867 = 3 ⋅304206289.

It is not a de Polignac number, because 768816219 - 2¹² = 768812123 is a prime.

It is a super-2 number, since 2×768816219² = 1182156757194911922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (768816289) 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 in 3 ways as a sum of consecutive naturals, for example, 128136034 + ... + 128136039.

It is an arithmetic number, because the mean of its divisors is an integer number (256272074).

Almost surely, 2^768816219 is an apocalyptic number.

768816219 is a deficient number, since it is larger than the sum of its proper divisors (256272077).

768816219 is a wasteful number, since it uses less digits than its factorization.

768816219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256272076.

The product of its digits is 290304, while the sum is 48.

The square root of 768816219 is about 27727.5353935398. The cubic root of 768816219 is about 916.0957019280.

The spelling of 768816219 in words is "seven hundred sixty-eight million, eight hundred sixteen thousand, two hundred nineteen".