8919869 has 4 divisors (see below), whose sum is σ = 10194144. Its totient is φ = 7645596.

The previous prime is 8919857. The next prime is 8919871. The reversal of 8919869 is 9689198.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9689198 = 2 ⋅4844599.

It is not a de Polignac number, because 8919869 - 2⁴ = 8919853 is a prime.

It is a super-2 number, since 2×8919869² = 159128125954322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8919809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637127 + ... + 637140.

It is an arithmetic number, because the mean of its divisors is an integer number (2548536).

Almost surely, 2^8919869 is an apocalyptic number.

It is an amenable number.

8919869 is a deficient number, since it is larger than the sum of its proper divisors (1274275).

8919869 is a wasteful number, since it uses less digits than its factorization.

8919869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274274.

The product of its digits is 279936, while the sum is 50.

The square root of 8919869 is about 2986.6149735110. The cubic root of 8919869 is about 207.3892107079.

The spelling of 8919869 in words is "eight million, nine hundred nineteen thousand, eight hundred sixty-nine".