44390609 has 2 divisors, whose sum is σ = 44390610. Its totient is φ = 44390608.

The previous prime is 44390573. The next prime is 44390629. The reversal of 44390609 is 90609344.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37552384 + 6838225 = 6128^2 + 2615^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44390609 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (44390629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22195304 + 22195305.

It is an arithmetic number, because the mean of its divisors is an integer number (22195305).

Almost surely, 2^44390609 is an apocalyptic number.

It is an amenable number.

44390609 is a deficient number, since it is larger than the sum of its proper divisors (1).

44390609 is an equidigital number, since it uses as much as digits as its factorization.

44390609 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 35.

The square root of 44390609 is about 6662.6277848909. The cubic root of 44390609 is about 354.0764435338.

The spelling of 44390609 in words is "forty-four million, three hundred ninety thousand, six hundred nine".