444551009 has 4 divisors (see below), whose sum is σ = 508058304. Its totient is φ = 381043716.

The previous prime is 444550991. The next prime is 444551011. The reversal of 444551009 is 900155444.

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 444551009 - 2¹⁶ = 444485473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (444551089) 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, 31753637 + ... + 31753650.

It is an arithmetic number, because the mean of its divisors is an integer number (127014576).

Almost surely, 2^444551009 is an apocalyptic number.

It is an amenable number.

444551009 is a deficient number, since it is larger than the sum of its proper divisors (63507295).

444551009 is an equidigital number, since it uses as much as digits as its factorization.

444551009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63507294.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 444551009 is about 21084.3783166590. The cubic root of 444551009 is about 763.2038164770.

The spelling of 444551009 in words is "four hundred forty-four million, five hundred fifty-one thousand, nine".