44218409 has 2 divisors, whose sum is σ = 44218410. Its totient is φ = 44218408.

The previous prime is 44218403. The next prime is 44218451. The reversal of 44218409 is 90481244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42250000 + 1968409 = 6500^2 + 1403^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44218409 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (44218403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22109204 + 22109205.

It is an arithmetic number, because the mean of its divisors is an integer number (22109205).

Almost surely, 2^44218409 is an apocalyptic number.

It is an amenable number.

44218409 is a deficient number, since it is larger than the sum of its proper divisors (1).

44218409 is an equidigital number, since it uses as much as digits as its factorization.

44218409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 44218409 is about 6649.6923989009. The cubic root of 44218409 is about 353.6180059190.

The spelling of 44218409 in words is "forty-four million, two hundred eighteen thousand, four hundred nine".