44173721 has 2 divisors, whose sum is σ = 44173722. Its totient is φ = 44173720.

The previous prime is 44173711. The next prime is 44173733. The reversal of 44173721 is 12737144.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22458121 + 21715600 = 4739^2 + 4660^2 .

It is a cyclic number.

It is not a de Polignac number, because 44173721 - 2²² = 39979417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (44173711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22086860 + 22086861.

It is an arithmetic number, because the mean of its divisors is an integer number (22086861).

Almost surely, 2^44173721 is an apocalyptic number.

It is an amenable number.

44173721 is a deficient number, since it is larger than the sum of its proper divisors (1).

44173721 is an equidigital number, since it uses as much as digits as its factorization.

44173721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4704, while the sum is 29.

The square root of 44173721 is about 6646.3313940850. The cubic root of 44173721 is about 353.4988413129.

The spelling of 44173721 in words is "forty-four million, one hundred seventy-three thousand, seven hundred twenty-one".