99966589 has 2 divisors, whose sum is σ = 99966590. Its totient is φ = 99966588.

The previous prime is 99966583. The next prime is 99966631. The reversal of 99966589 is 98566999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99900025 + 66564 = 9995^2 + 258^2 .

It is a cyclic number.

It is not a de Polignac number, because 99966589 - 2⁵ = 99966557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99966583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49983294 + 49983295.

It is an arithmetic number, because the mean of its divisors is an integer number (49983295).

Almost surely, 2^99966589 is an apocalyptic number.

It is an amenable number.

99966589 is a deficient number, since it is larger than the sum of its proper divisors (1).

99966589 is an equidigital number, since it uses as much as digits as its factorization.

99966589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9447840, while the sum is 61.

The square root of 99966589 is about 9998.3293104398. The cubic root of 99966589 is about 464.1071842283.

The spelling of 99966589 in words is "ninety-nine million, nine hundred sixty-six thousand, five hundred eighty-nine".