8019919 has 4 divisors (see below), whose sum is σ = 8442040. Its totient is φ = 7597800.

The previous prime is 8019911. The next prime is 8019931. The reversal of 8019919 is 9199108.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8019919 - 2³ = 8019911 is a prime.

It is a super-2 number, since 2×8019919² = 128638201533122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8019911) 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, 211032 + ... + 211069.

It is an arithmetic number, because the mean of its divisors is an integer number (2110510).

Almost surely, 2^8019919 is an apocalyptic number.

8019919 is a deficient number, since it is larger than the sum of its proper divisors (422121).

8019919 is a wasteful number, since it uses less digits than its factorization.

8019919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422120.

The product of its (nonzero) digits is 5832, while the sum is 37.

The square root of 8019919 is about 2831.9461506180. The cubic root of 8019919 is about 200.1658540908.

The spelling of 8019919 in words is "eight million, nineteen thousand, nine hundred nineteen".