1440004109 has 2 divisors, whose sum is σ = 1440004110. Its totient is φ = 1440004108.

The previous prime is 1440004099. The next prime is 1440004177. The reversal of 1440004109 is 9014000441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 989291209 + 450712900 = 31453^2 + 21230^2 .

It is an emirp because it is prime and its reverse (9014000441) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1440004109 is a prime.

It is a super-2 number, since 2×1440004109² = 4147223667873767762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1440004409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720002054 + 720002055.

It is an arithmetic number, because the mean of its divisors is an integer number (720002055).

Almost surely, 2^1440004109 is an apocalyptic number.

It is an amenable number.

1440004109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440004109 is an equidigital number, since it uses as much as digits as its factorization.

1440004109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1440004109 is about 37947.3860628107. The cubic root of 1440004109 is about 1129.2443087443.

The spelling of 1440004109 in words is "one billion, four hundred forty million, four thousand, one hundred nine".