8981689 has 2 divisors, whose sum is σ = 8981690. Its totient is φ = 8981688.

The previous prime is 8981659. The next prime is 8981717. The reversal of 8981689 is 9861898.

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., 8970025 + 11664 = 2995^2 + 108^2 .

It is a cyclic number.

It is not a de Polignac number, because 8981689 - 2⁵ = 8981657 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8981659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4490844 + 4490845.

It is an arithmetic number, because the mean of its divisors is an integer number (4490845).

Almost surely, 2^8981689 is an apocalyptic number.

It is an amenable number.

8981689 is a deficient number, since it is larger than the sum of its proper divisors (1).

8981689 is an equidigital number, since it uses as much as digits as its factorization.

8981689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 49.

The square root of 8981689 is about 2996.9466128044. The cubic root of 8981689 is about 207.8672183233.

The spelling of 8981689 in words is "eight million, nine hundred eighty-one thousand, six hundred eighty-nine".