1000001109 has 12 divisors (see below), whose sum is σ = 1370350464. Its totient is φ = 648646704.

The previous prime is 1000001099. The next prime is 1000001137. The reversal of 1000001109 is 9011000001.

It is not a de Polignac number, because 1000001109 - 2¹⁵ = 999968341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1000001094 and 1000001103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000008109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117637 + ... + 125850.

It is an arithmetic number, because the mean of its divisors is an integer number (114195872).

Almost surely, 2^1000001109 is an apocalyptic number.

It is an amenable number.

1000001109 is a deficient number, since it is larger than the sum of its proper divisors (370349355).

1000001109 is an equidigital number, since it uses as much as digits as its factorization.

1000001109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243564 (or 243527 counting only the distinct ones).

The product of its (nonzero) digits is 9, while the sum is 12.

The square root of 1000001109 is about 31622.7941365086. The cubic root of 1000001109 is about 1000.0003696665. Note that the first 3 decimals are identical.

The spelling of 1000001109 in words is "one billion, one thousand, one hundred nine".