99569999 has 2 divisors, whose sum is σ = 99570000. Its totient is φ = 99569998.

The previous prime is 99569989. The next prime is 99570011. The reversal of 99569999 is 99996599.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99569999 is a prime.

It is a Chen prime.

99569999 is a modest number, since divided by 9999 gives 9956 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99569929) 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, 49784999 + 49785000.

It is an arithmetic number, because the mean of its divisors is an integer number (49785000).

Almost surely, 2^99569999 is an apocalyptic number.

99569999 is a deficient number, since it is larger than the sum of its proper divisors (1).

99569999 is an equidigital number, since it uses as much as digits as its factorization.

99569999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15943230, while the sum is 65.

The square root of 99569999 is about 9978.4767875663. The cubic root of 99569999 is about 463.4926315369.

The spelling of 99569999 in words is "ninety-nine million, five hundred sixty-nine thousand, nine hundred ninety-nine".