1909440001 has 8 divisors (see below), whose sum is σ = 2228647680. Its totient is φ = 1601839968.

The previous prime is 1909439999. The next prime is 1909440037. The reversal of 1909440001 is 1000449091.

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 1909440001 - 2¹ = 1909439999 is a prime.

It is a super-2 number, since 2×1909440001² = 7291922234837760002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1909240001) 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, 2901556 + ... + 2902213.

It is an arithmetic number, because the mean of its divisors is an integer number (278580960).

Almost surely, 2^1909440001 is an apocalyptic number.

It is an amenable number.

1909440001 is a deficient number, since it is larger than the sum of its proper divisors (319207679).

1909440001 is an equidigital number, since it uses as much as digits as its factorization.

1909440001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5803823.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1909440001 is about 43697.1395059219. The cubic root of 1909440001 is about 1240.6101751140.

Adding to 1909440001 its reverse (1000449091), we get a palindrome (2909889092).

It can be divided in two parts, 19094 and 40001, that added together give a palindrome (59095).

The spelling of 1909440001 in words is "one billion, nine hundred nine million, four hundred forty thousand, one".