44481989 has 2 divisors, whose sum is σ = 44481990. Its totient is φ = 44481988.

The previous prime is 44481973. The next prime is 44481991. The reversal of 44481989 is 98918444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24750625 + 19731364 = 4975^2 + 4442^2 .

It is a cyclic number.

It is not a de Polignac number, because 44481989 - 2⁴ = 44481973 is a prime.

It is a super-2 number, since 2×44481989² = 3957294690792242, which contains 22 as substring.

Together with 44481991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44481949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22240994 + 22240995.

It is an arithmetic number, because the mean of its divisors is an integer number (22240995).

Almost surely, 2^44481989 is an apocalyptic number.

It is an amenable number.

44481989 is a deficient number, since it is larger than the sum of its proper divisors (1).

44481989 is an equidigital number, since it uses as much as digits as its factorization.

44481989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776, while the sum is 47.

The square root of 44481989 is about 6669.4819139121. The cubic root of 44481989 is about 354.3192375973.

The spelling of 44481989 in words is "forty-four million, four hundred eighty-one thousand, nine hundred eighty-nine".