8981881 has 4 divisors (see below), whose sum is σ = 8991232. Its totient is φ = 8972532.

The previous prime is 8981879. The next prime is 8981887. The reversal of 8981881 is 1881898.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1881898 = 2 ⋅940949.

It is a cyclic number.

It is not a de Polignac number, because 8981881 - 2¹ = 8981879 is a prime.

It is a super-2 number, since 2×8981881² = 161348372596322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8981887) 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 3 ways as a sum of consecutive naturals, for example, 3045 + ... + 5218.

It is an arithmetic number, because the mean of its divisors is an integer number (2247808).

Almost surely, 2^8981881 is an apocalyptic number.

It is an amenable number.

8981881 is a deficient number, since it is larger than the sum of its proper divisors (9351).

8981881 is a wasteful number, since it uses less digits than its factorization.

8981881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9350.

The product of its digits is 36864, while the sum is 43.

The square root of 8981881 is about 2996.9786452359. The cubic root of 8981881 is about 207.8686994931.

The spelling of 8981881 in words is "eight million, nine hundred eighty-one thousand, eight hundred eighty-one".