8907989 has 2 divisors, whose sum is σ = 8907990. Its totient is φ = 8907988.

The previous prime is 8907937. The next prime is 8908001. The reversal of 8907989 is 9897098.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8614225 + 293764 = 2935^2 + 542^2 .

It is a cyclic number.

It is not a de Polignac number, because 8907989 - 2⁸ = 8907733 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8907919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4453994 + 4453995.

It is an arithmetic number, because the mean of its divisors is an integer number (4453995).

Almost surely, 2^8907989 is an apocalyptic number.

It is an amenable number.

8907989 is a deficient number, since it is larger than the sum of its proper divisors (1).

8907989 is an equidigital number, since it uses as much as digits as its factorization.

8907989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 50.

The square root of 8907989 is about 2984.6254371361. The cubic root of 8907989 is about 207.2970988007.

The spelling of 8907989 in words is "eight million, nine hundred seven thousand, nine hundred eighty-nine".