8508989 has 2 divisors, whose sum is σ = 8508990. Its totient is φ = 8508988.

The previous prime is 8508967. The next prime is 8509009. The reversal of 8508989 is 9898058.

It is a happy number.

8508989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8508889 + 100 = 2917^2 + 10^2 .

It is a cyclic number.

It is not a de Polignac number, because 8508989 - 2⁸ = 8508733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8508949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4254494 + 4254495.

It is an arithmetic number, because the mean of its divisors is an integer number (4254495).

Almost surely, 2^8508989 is an apocalyptic number.

It is an amenable number.

8508989 is a deficient number, since it is larger than the sum of its proper divisors (1).

8508989 is an equidigital number, since it uses as much as digits as its factorization.

8508989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 47.

The square root of 8508989 is about 2917.0171408478. The cubic root of 8508989 is about 204.1546709228.

The spelling of 8508989 in words is "eight million, five hundred eight thousand, nine hundred eighty-nine".