8791000219 has 4 divisors (see below), whose sum is σ = 8792348296. Its totient is φ = 8789652144.

The previous prime is 8791000217. The next prime is 8791000247. The reversal of 8791000219 is 9120001978.

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

It is a 4-Lehmer number, since φ(8791000219) divides (8791000219-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 8791000219 - 2¹ = 8791000217 is a prime.

It is a super-2 number, since 2×8791000219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8791000217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 664209 + ... + 677314.

It is an arithmetic number, because the mean of its divisors is an integer number (2198087074).

Almost surely, 2^8791000219 is an apocalyptic number.

8791000219 is a deficient number, since it is larger than the sum of its proper divisors (1348077).

8791000219 is a wasteful number, since it uses less digits than its factorization.

8791000219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348076.

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 8791000219 is about 93760.3339317859. Note that the first 3 decimals coincide. The cubic root of 8791000219 is about 2063.8561806219.

The spelling of 8791000219 in words is "eight billion, seven hundred ninety-one million, two hundred nineteen", and thus it is an aban number.