8989861 has 2 divisors, whose sum is σ = 8989862. Its totient is φ = 8989860.

The previous prime is 8989837. The next prime is 8989867. The reversal of 8989861 is 1689898.

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., 7667361 + 1322500 = 2769^2 + 1150^2 .

It is a cyclic number.

It is not a de Polignac number, because 8989861 - 2⁷ = 8989733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8989867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4494930 + 4494931.

It is an arithmetic number, because the mean of its divisors is an integer number (4494931).

Almost surely, 2^8989861 is an apocalyptic number.

It is an amenable number.

8989861 is a deficient number, since it is larger than the sum of its proper divisors (1).

8989861 is an equidigital number, since it uses as much as digits as its factorization.

8989861 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 8989861 is about 2998.3096904756. The cubic root of 8989861 is about 207.9302419551.

The spelling of 8989861 in words is "eight million, nine hundred eighty-nine thousand, eight hundred sixty-one".