444408997 has 8 divisors (see below), whose sum is σ = 446486040. Its totient is φ = 442337280.

The previous prime is 444408971. The next prime is 444409001. The reversal of 444408997 is 799804444.

It can be written as a sum of positive squares in 4 ways, for example, as 3786916 + 440622081 = 1946^2 + 20991^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-444408997 is a prime.

It is a super-2 number, since 2×444408997² = 394998713229092018, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 444408997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444408907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310279 + ... + 311707.

It is an arithmetic number, because the mean of its divisors is an integer number (55810755).

Almost surely, 2^444408997 is an apocalyptic number.

It is an amenable number.

444408997 is a deficient number, since it is larger than the sum of its proper divisors (2077043).

444408997 is a wasteful number, since it uses less digits than its factorization.

444408997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2663.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The square root of 444408997 is about 21081.0103410629. The cubic root of 444408997 is about 763.1225392322.

The spelling of 444408997 in words is "four hundred forty-four million, four hundred eight thousand, nine hundred ninety-seven".