1444455409 has 4 divisors (see below), whose sum is σ = 1444631104. Its totient is φ = 1444279716.

The previous prime is 1444455401. The next prime is 1444455413. The reversal of 1444455409 is 9045544441.

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 a cyclic number.

It is not a de Polignac number, because 1444455409 - 2³ = 1444455401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1444455401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74877 + ... + 92170.

It is an arithmetic number, because the mean of its divisors is an integer number (361157776).

Almost surely, 2^1444455409 is an apocalyptic number.

It is an amenable number.

1444455409 is a deficient number, since it is larger than the sum of its proper divisors (175695).

1444455409 is an equidigital number, since it uses as much as digits as its factorization.

1444455409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175694.

The product of its (nonzero) digits is 230400, while the sum is 40.

The square root of 1444455409 is about 38005.9917513015. The cubic root of 1444455409 is about 1130.4066745713.

The spelling of 1444455409 in words is "one billion, four hundred forty-four million, four hundred fifty-five thousand, four hundred nine".