8019819 has 6 divisors (see below), whose sum is σ = 11584196. Its totient is φ = 5346540.

The previous prime is 8019779. The next prime is 8019821. The reversal of 8019819 is 9189108.

It is not a de Polignac number, because 8019819 - 2⁹ = 8019307 is a prime.

It is a super-2 number, since 2×8019819² = 128634993585522, which contains 22 as substring.

It is a Duffinian number.

8019819 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8019839) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 445537 + ... + 445554.

Almost surely, 2^8019819 is an apocalyptic number.

8019819 is a deficient number, since it is larger than the sum of its proper divisors (3564377).

8019819 is a wasteful number, since it uses less digits than its factorization.

8019819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891097 (or 891094 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 8019819 is about 2831.9284948600. The cubic root of 8019819 is about 200.1650221344.

The spelling of 8019819 in words is "eight million, nineteen thousand, eight hundred nineteen".