8864991 has 8 divisors (see below), whose sum is σ = 13133360. Its totient is φ = 5909976.

The previous prime is 8864987. The next prime is 8864993. The reversal of 8864991 is 1994688.

It is not a de Polignac number, because 8864991 - 2² = 8864987 is a prime.

It is an Ulam number.

It is a Duffinian number.

8864991 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8864993) 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 7 ways as a sum of consecutive naturals, for example, 164140 + ... + 164193.

It is an arithmetic number, because the mean of its divisors is an integer number (1641670).

Almost surely, 2^8864991 is an apocalyptic number.

8864991 is a deficient number, since it is larger than the sum of its proper divisors (4268369).

8864991 is a wasteful number, since it uses less digits than its factorization.

8864991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328342 (or 328336 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 8864991 is about 2977.4134748133. The cubic root of 8864991 is about 206.9630263726.

The spelling of 8864991 in words is "eight million, eight hundred sixty-four thousand, nine hundred ninety-one".