1110099991 has 48 divisors (see below), whose sum is σ = 1564254720. Its totient is φ = 763551360.

The previous prime is 1110099979. The next prime is 1110100031. The reversal of 1110099991 is 1999900111.

It is not a de Polignac number, because 1110099991 - 2²³ = 1101711383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1110099901) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 297445 + ... + 301153.

It is an arithmetic number, because the mean of its divisors is an integer number (32588640).

Almost surely, 2^1110099991 is an apocalyptic number.

1110099991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1110099991 is a deficient number, since it is larger than the sum of its proper divisors (454154729).

1110099991 is a wasteful number, since it uses less digits than its factorization.

1110099991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3776 (or 3763 counting only the distinct ones).

The product of its (nonzero) digits is 6561, while the sum is 40.

The square root of 1110099991 is about 33318.1630796177. The cubic root of 1110099991 is about 1035.4298947737.

The spelling of 1110099991 in words is "one billion, one hundred ten million, ninety-nine thousand, nine hundred ninety-one".