990505099 has 16 divisors (see below), whose sum is σ = 1020706272. Its totient is φ = 960899328.

The previous prime is 990505057. The next prime is 990505123.

990505099 is nontrivially palindromic in base 10.

990505099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 990505099 - 2⁷ = 990504971 is a prime.

It is a super-2 number, since 2×990505099² = 1962200702289999602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (990505199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1350937 + ... + 1351669.

It is an arithmetic number, because the mean of its divisors is an integer number (63794142).

Almost surely, 2^990505099 is an apocalyptic number.

990505099 is a deficient number, since it is larger than the sum of its proper divisors (30201173).

990505099 is a wasteful number, since it uses less digits than its factorization.

990505099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086.

The product of its (nonzero) digits is 164025, while the sum is 46.

The square root of 990505099 is about 31472.2909715832. The cubic root of 990505099 is about 996.8249628079.

The spelling of 990505099 in words is "nine hundred ninety million, five hundred five thousand, ninety-nine".