44521993 has 2 divisors, whose sum is σ = 44521994. Its totient is φ = 44521992.

The previous prime is 44521991. The next prime is 44522003. The reversal of 44521993 is 39912544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30173049 + 14348944 = 5493^2 + 3788^2 .

It is a cyclic number.

It is not a de Polignac number, because 44521993 - 2¹ = 44521991 is a prime.

Together with 44521991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (44521991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22260996 + 22260997.

It is an arithmetic number, because the mean of its divisors is an integer number (22260997).

Almost surely, 2^44521993 is an apocalyptic number.

It is an amenable number.

44521993 is a deficient number, since it is larger than the sum of its proper divisors (1).

44521993 is an equidigital number, since it uses as much as digits as its factorization.

44521993 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 44521993 is about 6672.4802734815. The cubic root of 44521993 is about 354.4254224460.

The spelling of 44521993 in words is "forty-four million, five hundred twenty-one thousand, nine hundred ninety-three".