99989599 has 2 divisors, whose sum is σ = 99989600. Its totient is φ = 99989598.

The previous prime is 99989581. The next prime is 99989627. The reversal of 99989599 is 99598999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99989599 - 2⁵ = 99989567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99989509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49994799 + 49994800.

It is an arithmetic number, because the mean of its divisors is an integer number (49994800).

Almost surely, 2^99989599 is an apocalyptic number.

99989599 is a deficient number, since it is larger than the sum of its proper divisors (1).

99989599 is an equidigital number, since it uses as much as digits as its factorization.

99989599 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21257640, while the sum is 67.

The square root of 99989599 is about 9999.4799364767. The cubic root of 99989599 is about 464.1427904148.

The spelling of 99989599 in words is "ninety-nine million, nine hundred eighty-nine thousand, five hundred ninety-nine".