44307721 has 2 divisors, whose sum is σ = 44307722. Its totient is φ = 44307720.

The previous prime is 44307709. The next prime is 44307727. The reversal of 44307721 is 12770344.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39200121 + 5107600 = 6261^2 + 2260^2 .

It is a cyclic number.

It is not a de Polignac number, because 44307721 - 2⁵ = 44307689 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 44307721.

It is not a weakly prime, because it can be changed into another prime (44307727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22153860 + 22153861.

It is an arithmetic number, because the mean of its divisors is an integer number (22153861).

Almost surely, 2^44307721 is an apocalyptic number.

It is an amenable number.

44307721 is a deficient number, since it is larger than the sum of its proper divisors (1).

44307721 is an equidigital number, since it uses as much as digits as its factorization.

44307721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 44307721 is about 6656.4045099438. The cubic root of 44307721 is about 353.8559241122.

The spelling of 44307721 in words is "forty-four million, three hundred seven thousand, seven hundred twenty-one".