99969589 has 2 divisors, whose sum is σ = 99969590. Its totient is φ = 99969588.

The previous prime is 99969581. The next prime is 99969601. The reversal of 99969589 is 98596999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91355364 + 8614225 = 9558^2 + 2935^2 .

It is a cyclic number.

It is not a de Polignac number, because 99969589 - 2³ = 99969581 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99969589.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99969581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49984794 + 49984795.

It is an arithmetic number, because the mean of its divisors is an integer number (49984795).

Almost surely, 2^99969589 is an apocalyptic number.

It is an amenable number.

99969589 is a deficient number, since it is larger than the sum of its proper divisors (1).

99969589 is an equidigital number, since it uses as much as digits as its factorization.

99969589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14171760, while the sum is 64.

The square root of 99969589 is about 9998.4793343788. The cubic root of 99969589 is about 464.1118268048. Note that the first 3 decimals are identical.

The spelling of 99969589 in words is "ninety-nine million, nine hundred sixty-nine thousand, five hundred eighty-nine".