1009991110 has 8 divisors (see below), whose sum is σ = 1817984016. Its totient is φ = 403996440.

The previous prime is 1009991093. The next prime is 1009991141. The reversal of 1009991110 is 111999001.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50499546 + ... + 50499565.

It is an arithmetic number, because the mean of its divisors is an integer number (227248002).

Almost surely, 2^1009991110 is an apocalyptic number.

1009991110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1009991110 is a deficient number, since it is larger than the sum of its proper divisors (807992906).

1009991110 is a wasteful number, since it uses less digits than its factorization.

1009991110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100999118.

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

The square root of 1009991110 is about 31780.3572981803. The cubic root of 1009991110 is about 1003.3193397925.

It can be divided in two parts, 1009991 and 110, that added together give a palindrome (1010101).

The spelling of 1009991110 in words is "one billion, nine million, nine hundred ninety-one thousand, one hundred ten".