8981891 has 6 divisors (see below), whose sum is σ = 9389940. Its totient is φ = 8590868.

The previous prime is 8981887. The next prime is 8981897. The reversal of 8981891 is 1981898.

It is a happy number.

It is not a de Polignac number, because 8981891 - 2² = 8981887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8981897) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7961 + ... + 9018.

It is an arithmetic number, because the mean of its divisors is an integer number (1564990).

Almost surely, 2^8981891 is an apocalyptic number.

8981891 is a deficient number, since it is larger than the sum of its proper divisors (408049).

8981891 is a wasteful number, since it uses less digits than its factorization.

8981891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17025 (or 17002 counting only the distinct ones).

The product of its digits is 41472, while the sum is 44.

The square root of 8981891 is about 2996.9803135823. The cubic root of 8981891 is about 207.8687766368.

The spelling of 8981891 in words is "eight million, nine hundred eighty-one thousand, eight hundred ninety-one".