44447621 has 4 divisors (see below), whose sum is σ = 44465100. Its totient is φ = 44430144.

The previous prime is 44447617. The next prime is 44447651. The reversal of 44447621 is 12674444.

44447621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28206721 + 16240900 = 5311^2 + 4030^2 .

It is a cyclic number.

It is not a de Polignac number, because 44447621 - 2² = 44447617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44447651) 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 in 3 ways as a sum of consecutive naturals, for example, 4106 + ... + 10283.

It is an arithmetic number, because the mean of its divisors is an integer number (11116275).

Almost surely, 2^44447621 is an apocalyptic number.

It is an amenable number.

44447621 is a deficient number, since it is larger than the sum of its proper divisors (17479).

44447621 is a wasteful number, since it uses less digits than its factorization.

44447621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17478.

The product of its digits is 21504, while the sum is 32.

The square root of 44447621 is about 6666.9049040766. The cubic root of 44447621 is about 354.2279618448.

The spelling of 44447621 in words is "forty-four million, four hundred forty-seven thousand, six hundred twenty-one".