1100001091 has 8 divisors (see below), whose sum is σ = 1261188864. Its totient is φ = 939824520.

The previous prime is 1100001079. The next prime is 1100001101. The reversal of 1100001091 is 1901000011.

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

It is a cyclic number.

It is not a de Polignac number, because 1100001091 - 2²⁵ = 1066446659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1100001041) 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 7 ways as a sum of consecutive naturals, for example, 250465 + ... + 254818.

It is an arithmetic number, because the mean of its divisors is an integer number (157648608).

Almost surely, 2^1100001091 is an apocalyptic number.

1100001091 is a deficient number, since it is larger than the sum of its proper divisors (161187773).

1100001091 is an equidigital number, since it uses as much as digits as its factorization.

1100001091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505601.

The product of its (nonzero) digits is 9, while the sum is 13.

The square root of 1100001091 is about 33166.2643509938. The cubic root of 1100001091 is about 1032.2804567343.

The spelling of 1100001091 in words is "one billion, one hundred million, one thousand, ninety-one".