8789981 has 2 divisors, whose sum is σ = 8789982. Its totient is φ = 8789980.

The previous prime is 8789953. The next prime is 8789983. The reversal of 8789981 is 1899878.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7513081 + 1276900 = 2741^2 + 1130^2 .

It is a cyclic number.

It is not a de Polignac number, because 8789981 - 2¹⁰ = 8788957 is a prime.

It is a super-2 number, since 2×8789981² = 154527531960722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 8789983, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8789983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4394990 + 4394991.

It is an arithmetic number, because the mean of its divisors is an integer number (4394991).

Almost surely, 2^8789981 is an apocalyptic number.

It is an amenable number.

8789981 is a deficient number, since it is larger than the sum of its proper divisors (1).

8789981 is an equidigital number, since it uses as much as digits as its factorization.

8789981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 50.

The square root of 8789981 is about 2964.7902118025. The cubic root of 8789981 is about 206.3776417126.

The spelling of 8789981 in words is "eight million, seven hundred eighty-nine thousand, nine hundred eighty-one".