99986489 has 2 divisors, whose sum is σ = 99986490. Its totient is φ = 99986488.

The previous prime is 99986483. The next prime is 99986507. The reversal of 99986489 is 98468999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75829264 + 24157225 = 8708^2 + 4915^2 .

It is an emirp because it is prime and its reverse (98468999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99986489 - 2⁸ = 99986233 is a prime.

It is not a weakly prime, because it can be changed into another prime (99986483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49993244 + 49993245.

It is an arithmetic number, because the mean of its divisors is an integer number (49993245).

Almost surely, 2^99986489 is an apocalyptic number.

It is an amenable number.

99986489 is a deficient number, since it is larger than the sum of its proper divisors (1).

99986489 is an equidigital number, since it uses as much as digits as its factorization.

99986489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10077696, while the sum is 62.

The square root of 99986489 is about 9999.3244271801. The cubic root of 99986489 is about 464.1379782508.

The spelling of 99986489 in words is "ninety-nine million, nine hundred eighty-six thousand, four hundred eighty-nine".