1443940009 has 8 divisors (see below), whose sum is σ = 1479660840. Its totient is φ = 1408243200.

The previous prime is 1443940007. The next prime is 1443940019. The reversal of 1443940009 is 9000493441.

It can be written as a sum of positive squares in 4 ways, for example, as 451690009 + 992250000 = 21253^2 + 31500^2 .

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 1443940009 - 2¹ = 1443940007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1443940007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210189 + ... + 216949.

It is an arithmetic number, because the mean of its divisors is an integer number (184957605).

Almost surely, 2^1443940009 is an apocalyptic number.

It is an amenable number.

1443940009 is a deficient number, since it is larger than the sum of its proper divisors (35720831).

1443940009 is an equidigital number, since it uses as much as digits as its factorization.

1443940009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12011.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 1443940009 is about 37999.2106365382. The cubic root of 1443940009 is about 1130.2722107670.

The spelling of 1443940009 in words is "one billion, four hundred forty-three million, nine hundred forty thousand, nine".