8999791 has 4 divisors (see below), whose sum is σ = 9016792. Its totient is φ = 8982792.

The previous prime is 8999789. The next prime is 8999813. The reversal of 8999791 is 1979998.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1979998 = 2 ⋅989999.

It is a cyclic number.

It is not a de Polignac number, because 8999791 - 2¹ = 8999789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8999741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7680 + ... + 8773.

It is an arithmetic number, because the mean of its divisors is an integer number (2254198).

Almost surely, 2^8999791 is an apocalyptic number.

8999791 is a deficient number, since it is larger than the sum of its proper divisors (17001).

8999791 is a wasteful number, since it uses less digits than its factorization.

8999791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17000.

The product of its digits is 367416, while the sum is 52.

The square root of 8999791 is about 2999.9651664644. The cubic root of 8999791 is about 208.0067721538.

The spelling of 8999791 in words is "eight million, nine hundred ninety-nine thousand, seven hundred ninety-one".