99608689 has 2 divisors, whose sum is σ = 99608690. Its totient is φ = 99608688.

The previous prime is 99608681. The next prime is 99608693. The reversal of 99608689 is 98680699.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77141089 + 22467600 = 8783^2 + 4740^2 .

It is a cyclic number.

It is not a de Polignac number, because 99608689 - 2³ = 99608681 is a prime.

It is not a weakly prime, because it can be changed into another prime (99608681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49804344 + 49804345.

It is an arithmetic number, because the mean of its divisors is an integer number (49804345).

Almost surely, 2^99608689 is an apocalyptic number.

It is an amenable number.

99608689 is a deficient number, since it is larger than the sum of its proper divisors (1).

99608689 is an equidigital number, since it uses as much as digits as its factorization.

99608689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1679616, while the sum is 55.

The square root of 99608689 is about 9980.4152719213. The cubic root of 99608689 is about 463.5526570062.

The spelling of 99608689 in words is "ninety-nine million, six hundred eight thousand, six hundred eighty-nine".