99999999599 has 2 divisors, whose sum is σ = 99999999600. Its totient is φ = 99999999598.

The previous prime is 99999999581. The next prime is 99999999647. The reversal of 99999999599 is 99599999999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99999999599 - 2¹⁶ = 99999934063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99999999529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49999999799 + 49999999800.

It is an arithmetic number, because the mean of its divisors is an integer number (49999999800).

Almost surely, 2^99999999599 is an apocalyptic number.

99999999599 is a deficient number, since it is larger than the sum of its proper divisors (1).

99999999599 is an equidigital number, since it uses as much as digits as its factorization.

99999999599 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17433922005, while the sum is 95.

The spelling of 99999999599 in words is "ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, five hundred ninety-nine".