444198709 has 4 divisors (see below), whose sum is σ = 444245004. Its totient is φ = 444152416.

The previous prime is 444198697. The next prime is 444198719. The reversal of 444198709 is 907891444.

444198709 = T₁₇₂₀₇ + T₁₇₂₀₈ + T₁₇₂₀₉.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 419348484 + 24850225 = 20478^2 + 4985^2 .

It is a cyclic number.

It is not a de Polignac number, because 444198709 - 2⁷ = 444198581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444198719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2782 + ... + 29935.

It is an arithmetic number, because the mean of its divisors is an integer number (111061251).

Almost surely, 2^444198709 is an apocalyptic number.

444198709 is the 17209-th centered triangular number.

It is an amenable number.

444198709 is a deficient number, since it is larger than the sum of its proper divisors (46295).

444198709 is a wasteful number, since it uses less digits than its factorization.

444198709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46294.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 444198709 is about 21076.0221341694. The cubic root of 444198709 is about 763.0021540076.

The spelling of 444198709 in words is "four hundred forty-four million, one hundred ninety-eight thousand, seven hundred nine".