99955599 has 8 divisors (see below), whose sum is σ = 140288640. Its totient is φ = 63129816.

The previous prime is 99955589. The next prime is 99955601. The reversal of 99955599 is 99555999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99955599 - 2⁵ = 99955567 is a prime.

It is a super-2 number, since 2×99955599² = 19982243542897602, which contains 22 as substring.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99955519) 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 in 7 ways as a sum of consecutive naturals, for example, 876747 + ... + 876860.

It is an arithmetic number, because the mean of its divisors is an integer number (17536080).

Almost surely, 2^99955599 is an apocalyptic number.

99955599 is a deficient number, since it is larger than the sum of its proper divisors (40333041).

99955599 is a wasteful number, since it uses less digits than its factorization.

99955599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1753629.

The product of its digits is 7381125, while the sum is 60.

The square root of 99955599 is about 9997.7797035142. The cubic root of 99955599 is about 464.0901761294.

The spelling of 99955599 in words is "ninety-nine million, nine hundred fifty-five thousand, five hundred ninety-nine".