99759999 has 4 divisors (see below), whose sum is σ = 133013336. Its totient is φ = 66506664.

The previous prime is 99759967. The next prime is 99760009. The reversal of 99759999 is 99995799.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 99759999 - 2⁵ = 99759967 is a prime.

It is a Duffinian number.

99759999 is a modest number, since divided by 9999 gives 9975 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99754999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16626664 + ... + 16626669.

It is an arithmetic number, because the mean of its divisors is an integer number (33253334).

Almost surely, 2^99759999 is an apocalyptic number.

99759999 is a deficient number, since it is larger than the sum of its proper divisors (33253337).

99759999 is a wasteful number, since it uses less digits than its factorization.

99759999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33253336.

The product of its digits is 18600435, while the sum is 66.

The square root of 99759999 is about 9987.9927412869. The cubic root of 99759999 is about 463.7872572465.

The spelling of 99759999 in words is "ninety-nine million, seven hundred fifty-nine thousand, nine hundred ninety-nine".