8981091 has 64 divisors (see below), whose sum is σ = 16665600. Its totient is φ = 4665600.

The previous prime is 8981087. The next prime is 8981099. The reversal of 8981091 is 1901898.

It is not a de Polignac number, because 8981091 - 2² = 8981087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8981099) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 147201 + ... + 147261.

It is an arithmetic number, because the mean of its divisors is an integer number (260400).

Almost surely, 2^8981091 is an apocalyptic number.

8981091 is a deficient number, since it is larger than the sum of its proper divisors (7684509).

8981091 is a wasteful number, since it uses less digits than its factorization.

8981091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 8981091 is about 2996.8468429334. The cubic root of 8981091 is about 207.8626049610.

The spelling of 8981091 in words is "eight million, nine hundred eighty-one thousand, ninety-one".