990090099 has 24 divisors (see below), whose sum is σ = 1470565824. Its totient is φ = 641520000.

The previous prime is 990090097. The next prime is 990090119.

990090099 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 990090099 - 2¹ = 990090097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (990090097) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95049 + ... + 104949.

It is an arithmetic number, because the mean of its divisors is an integer number (61273576).

Almost surely, 2^990090099 is an apocalyptic number.

990090099 is a deficient number, since it is larger than the sum of its proper divisors (480475725).

990090099 is a wasteful number, since it uses less digits than its factorization.

990090099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10219 (or 10216 counting only the distinct ones).

The product of its (nonzero) digits is 59049, while the sum is 45.

The square root of 990090099 is about 31465.6971796272. The cubic root of 990090099 is about 996.6857273989.

It can be divided in two parts, 9900 and 90099, that added together give a palindrome (99999).

The spelling of 990090099 in words is "nine hundred ninety million, ninety thousand, ninety-nine".