99900055 has 8 divisors (see below), whose sum is σ = 119945232. Its totient is φ = 79876608.

The previous prime is 99900029. The next prime is 99900077. The reversal of 99900055 is 55000999.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 99900055 - 2¹⁹ = 99375767 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 99899987 and 99900023.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7479 + ... + 15991.

It is an arithmetic number, because the mean of its divisors is an integer number (14993154).

Almost surely, 2^99900055 is an apocalyptic number.

99900055 is a deficient number, since it is larger than the sum of its proper divisors (20045177).

99900055 is a wasteful number, since it uses less digits than its factorization.

99900055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10865.

The product of its (nonzero) digits is 18225, while the sum is 37.

The square root of 99900055 is about 9995.0015007503. The cubic root of 99900055 is about 464.0041972842.

The spelling of 99900055 in words is "ninety-nine million, nine hundred thousand, fifty-five".