8919819 has 6 divisors (see below), whose sum is σ = 12884196. Its totient is φ = 5946540.

The previous prime is 8919817. The next prime is 8919839. The reversal of 8919819 is 9189198.

It is not a de Polignac number, because 8919819 - 2¹ = 8919817 is a prime.

It is a super-2 number, since 2×8919819² = 159126341985522, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (8919817) 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, 495537 + ... + 495554.

It is an arithmetic number, because the mean of its divisors is an integer number (2147366).

Almost surely, 2^8919819 is an apocalyptic number.

8919819 is a deficient number, since it is larger than the sum of its proper divisors (3964377).

8919819 is a wasteful number, since it uses less digits than its factorization.

8919819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991097 (or 991094 counting only the distinct ones).

The product of its digits is 46656, while the sum is 45.

The square root of 8919819 is about 2986.6066028187. The cubic root of 8919819 is about 207.3888232030.

The spelling of 8919819 in words is "eight million, nine hundred nineteen thousand, eight hundred nineteen".