44539921 has 2 divisors, whose sum is σ = 44539922. Its totient is φ = 44539920.

The previous prime is 44539919. The next prime is 44539931. The reversal of 44539921 is 12993544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34680321 + 9859600 = 5889^2 + 3140^2 .

It is a cyclic number.

It is not a de Polignac number, because 44539921 - 2¹ = 44539919 is a prime.

Together with 44539919, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (44539931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22269960 + 22269961.

It is an arithmetic number, because the mean of its divisors is an integer number (22269961).

Almost surely, 2^44539921 is an apocalyptic number.

It is an amenable number.

44539921 is a deficient number, since it is larger than the sum of its proper divisors (1).

44539921 is an equidigital number, since it uses as much as digits as its factorization.

44539921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 37.

The square root of 44539921 is about 6673.8235667419. The cubic root of 44539921 is about 354.4729890967.

The spelling of 44539921 in words is "forty-four million, five hundred thirty-nine thousand, nine hundred twenty-one".