1109091001 has 4 divisors (see below), whose sum is σ = 1109311632. Its totient is φ = 1108870372.

The previous prime is 1109090989. The next prime is 1109091031. The reversal of 1109091001 is 1001909011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1001909011 = 47 ⋅21317213.

It is a cyclic number.

It is not a de Polignac number, because 1109091001 - 2¹³ = 1109082809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1109091031) 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, 102595 + ... + 112888.

It is an arithmetic number, because the mean of its divisors is an integer number (277327908).

Almost surely, 2^1109091001 is an apocalyptic number.

It is an amenable number.

1109091001 is a deficient number, since it is larger than the sum of its proper divisors (220631).

1109091001 is an equidigital number, since it uses as much as digits as its factorization.

1109091001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220630.

The product of its (nonzero) digits is 81, while the sum is 22.

The square root of 1109091001 is about 33303.0178962808. The cubic root of 1109091001 is about 1035.1160926823.

The spelling of 1109091001 in words is "one billion, one hundred nine million, ninety-one thousand, one".