8991079 has 12 divisors (see below), whose sum is σ = 9747864. Its totient is φ = 8288384.

The previous prime is 8991077. The next prime is 8991089. The reversal of 8991079 is 9701998.

It is not a de Polignac number, because 8991079 - 2¹ = 8991077 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 (8991077) 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 11 ways as a sum of consecutive naturals, for example, 15024 + ... + 15610.

It is an arithmetic number, because the mean of its divisors is an integer number (812322).

Almost surely, 2^8991079 is an apocalyptic number.

8991079 is a deficient number, since it is larger than the sum of its proper divisors (756785).

8991079 is a wasteful number, since it uses less digits than its factorization.

8991079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674 (or 657 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 8991079 is about 2998.5127980384. The cubic root of 8991079 is about 207.9396320743.

The spelling of 8991079 in words is "eight million, nine hundred ninety-one thousand, seventy-nine".