44647921 has 2 divisors, whose sum is σ = 44647922. Its totient is φ = 44647920.

The previous prime is 44647879. The next prime is 44647927. The reversal of 44647921 is 12974644.

It is a happy number.

44647921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32080896 + 12567025 = 5664^2 + 3545^2 .

It is a cyclic number.

It is not a de Polignac number, because 44647921 - 2¹¹ = 44645873 is a prime.

It is not a weakly prime, because it can be changed into another prime (44647927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22323960 + 22323961.

It is an arithmetic number, because the mean of its divisors is an integer number (22323961).

Almost surely, 2^44647921 is an apocalyptic number.

It is an amenable number.

44647921 is a deficient number, since it is larger than the sum of its proper divisors (1).

44647921 is an equidigital number, since it uses as much as digits as its factorization.

44647921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 37.

The square root of 44647921 is about 6681.9099814349. The cubic root of 44647921 is about 354.7592654735.

The spelling of 44647921 in words is "forty-four million, six hundred forty-seven thousand, nine hundred twenty-one".