1990109011 has 8 divisors (see below), whose sum is σ = 2197185984. Its totient is φ = 1787391720.

The previous prime is 1990108997. The next prime is 1990109053. The reversal of 1990109011 is 1109010991.

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

It is not a de Polignac number, because 1990109011 - 2¹⁵ = 1990076243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1990109071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1088961 + ... + 1090786.

It is an arithmetic number, because the mean of its divisors is an integer number (274648248).

Almost surely, 2^1990109011 is an apocalyptic number.

1990109011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1990109011 is a deficient number, since it is larger than the sum of its proper divisors (207076973).

1990109011 is a wasteful number, since it uses less digits than its factorization.

1990109011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2179841.

The product of its (nonzero) digits is 729, while the sum is 31.

The square root of 1990109011 is about 44610.6378681139. The cubic root of 1990109011 is about 1257.8406390220.

The spelling of 1990109011 in words is "one billion, nine hundred ninety million, one hundred nine thousand, eleven".