44209909 has 2 divisors, whose sum is σ = 44209910. Its totient is φ = 44209908.

The previous prime is 44209889. The next prime is 44209927. The reversal of 44209909 is 90990244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43956900 + 253009 = 6630^2 + 503^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44209909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44200909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22104954 + 22104955.

It is an arithmetic number, because the mean of its divisors is an integer number (22104955).

Almost surely, 2^44209909 is an apocalyptic number.

It is an amenable number.

44209909 is a deficient number, since it is larger than the sum of its proper divisors (1).

44209909 is an equidigital number, since it uses as much as digits as its factorization.

44209909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 44209909 is about 6649.0532408757. The cubic root of 44209909 is about 353.5953460832.

The spelling of 44209909 in words is "forty-four million, two hundred nine thousand, nine hundred nine".