8981131 has 4 divisors (see below), whose sum is σ = 8988552. Its totient is φ = 8973712.

The previous prime is 8981123. The next prime is 8981143. The reversal of 8981131 is 1311898.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 8981131 - 2³ = 8981123 is a prime.

It is a super-2 number, since 2×8981131² = 161321428078322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8981093 and 8981102.

It is not an unprimeable number, because it can be changed into a prime (8981101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1426 + ... + 4471.

It is an arithmetic number, because the mean of its divisors is an integer number (2247138).

Almost surely, 2^8981131 is an apocalyptic number.

8981131 is a deficient number, since it is larger than the sum of its proper divisors (7421).

8981131 is a wasteful number, since it uses less digits than its factorization.

8981131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7420.

The product of its digits is 1728, while the sum is 31.

The square root of 8981131 is about 2996.8535166070. The cubic root of 8981131 is about 207.8629135535.

The spelling of 8981131 in words is "eight million, nine hundred eighty-one thousand, one hundred thirty-one".