1101909091 has 4 divisors (see below), whose sum is σ = 1112819184. Its totient is φ = 1090999000.

The previous prime is 1101909049. The next prime is 1101909101. The reversal of 1101909091 is 1909091011.

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

It is a cyclic number.

It is not a de Polignac number, because 1101909091 - 2⁷ = 1101908963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1101909191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5454895 + ... + 5455096.

It is an arithmetic number, because the mean of its divisors is an integer number (278204796).

Almost surely, 2^1101909091 is an apocalyptic number.

1101909091 is a deficient number, since it is larger than the sum of its proper divisors (10910093).

1101909091 is a wasteful number, since it uses less digits than its factorization.

1101909091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10910092.

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

The square root of 1101909091 is about 33195.0160566312. The cubic root of 1101909091 is about 1032.8769571812.

The spelling of 1101909091 in words is "one billion, one hundred one million, nine hundred nine thousand, ninety-one".