990808099 has 4 divisors (see below), whose sum is σ = 1033886736. Its totient is φ = 947729464.

The previous prime is 990808087. The next prime is 990808111.

990808099 is nontrivially palindromic in base 10.

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

It is an interprime number because it is at equal distance from previous prime (990808087) and next prime (990808111).

It is a cyclic number.

It is not a de Polignac number, because 990808099 - 2¹¹ = 990806051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (990808079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21539284 + ... + 21539329.

It is an arithmetic number, because the mean of its divisors is an integer number (258471684).

Almost surely, 2^990808099 is an apocalyptic number.

990808099 is a deficient number, since it is larger than the sum of its proper divisors (43078637).

990808099 is a wasteful number, since it uses less digits than its factorization.

990808099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43078636.

The product of its (nonzero) digits is 419904, while the sum is 52.

The square root of 990808099 is about 31477.1043617420. The cubic root of 990808099 is about 996.9265968701.

The spelling of 990808099 in words is "nine hundred ninety million, eight hundred eight thousand, ninety-nine".