1909896009 has 8 divisors (see below), whose sum is σ = 2910317760. Its totient is φ = 1091369136.

The previous prime is 1909895947. The next prime is 1909896047. The reversal of 1909896009 is 9006989091.

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

It is not a de Polignac number, because 1909896009 - 2²⁰ = 1908847433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1909896049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45473694 + ... + 45473735.

It is an arithmetic number, because the mean of its divisors is an integer number (363789720).

Almost surely, 2^1909896009 is an apocalyptic number.

It is an amenable number.

1909896009 is a deficient number, since it is larger than the sum of its proper divisors (1000421751).

1909896009 is an equidigital number, since it uses as much as digits as its factorization.

1909896009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90947439.

The product of its (nonzero) digits is 314928, while the sum is 51.

The square root of 1909896009 is about 43702.3570188154. The cubic root of 1909896009 is about 1240.7089271277.

The spelling of 1909896009 in words is "one billion, nine hundred nine million, eight hundred ninety-six thousand, nine".