1001001109 has 8 divisors (see below), whose sum is σ = 1004545080. Its totient is φ = 997464000.

The previous prime is 1001001061. The next prime is 1001001119. The reversal of 1001001109 is 9011001001.

It can be written as a sum of positive squares in 4 ways, for example, as 3073009 + 997928100 = 1753^2 + 31590^2 .

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 1001001109 - 2⁷ = 1001000981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001001119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 598927 + ... + 600595.

It is an arithmetic number, because the mean of its divisors is an integer number (125568135).

Almost surely, 2^1001001109 is an apocalyptic number.

It is an amenable number.

1001001109 is a deficient number, since it is larger than the sum of its proper divisors (3543971).

1001001109 is a wasteful number, since it uses less digits than its factorization.

1001001109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3431.

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

The square root of 1001001109 is about 31638.6015651767. The cubic root of 1001001109 is about 1000.3335917042. Note that the first 3 decimals are identical.

The spelling of 1001001109 in words is "one billion, one million, one thousand, one hundred nine".