1443909 has 4 divisors (see below), whose sum is σ = 1925216. Its totient is φ = 962604.

The previous prime is 1443899. The next prime is 1443913. The reversal of 1443909 is 9093441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1443909 - 2⁷ = 1443781 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1443989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240649 + ... + 240654.

It is an arithmetic number, because the mean of its divisors is an integer number (481304).

2^1443909 is an apocalyptic number.

It is an amenable number.

1443909 is a deficient number, since it is larger than the sum of its proper divisors (481307).

1443909 is an equidigital number, since it uses as much as digits as its factorization.

1443909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481306.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 1443909 is about 1201.6276461533. The cubic root of 1443909 is about 113.0264119743.

The spelling of 1443909 in words is "one million, four hundred forty-three thousand, nine hundred nine".