8658989 has 2 divisors, whose sum is σ = 8658990. Its totient is φ = 8658988.

The previous prime is 8658983. The next prime is 8658997. The reversal of 8658989 is 9898568.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7382089 + 1276900 = 2717^2 + 1130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8658989 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8658989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8658983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4329494 + 4329495.

It is an arithmetic number, because the mean of its divisors is an integer number (4329495).

Almost surely, 2^8658989 is an apocalyptic number.

It is an amenable number.

8658989 is a deficient number, since it is larger than the sum of its proper divisors (1).

8658989 is an equidigital number, since it uses as much as digits as its factorization.

8658989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1244160, while the sum is 53.

The square root of 8658989 is about 2942.6160130061. The cubic root of 8658989 is about 205.3473310743.

The spelling of 8658989 in words is "eight million, six hundred fifty-eight thousand, nine hundred eighty-nine".