220444709 has 4 divisors (see below), whose sum is σ = 224181120. Its totient is φ = 216708300.

The previous prime is 220444663. The next prime is 220444739. The reversal of 220444709 is 907444022.

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, and also an emirpimes, since its reverse is a distinct semiprime: 907444022 = 2 ⋅453722011.

It is a cyclic number.

It is not a de Polignac number, because 220444709 - 2⁸ = 220444453 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220444739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1868117 + ... + 1868234.

It is an arithmetic number, because the mean of its divisors is an integer number (56045280).

Almost surely, 2^220444709 is an apocalyptic number.

It is an amenable number.

220444709 is a deficient number, since it is larger than the sum of its proper divisors (3736411).

220444709 is an equidigital number, since it uses as much as digits as its factorization.

220444709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3736410.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 220444709 is about 14847.3805433821. The cubic root of 220444709 is about 604.0875611329.

The spelling of 220444709 in words is "two hundred twenty million, four hundred forty-four thousand, seven hundred nine".