44404981 has 2 divisors, whose sum is σ = 44404982. Its totient is φ = 44404980.

The previous prime is 44404979. The next prime is 44405021. The reversal of 44404981 is 18940444.

44404981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34222500 + 10182481 = 5850^2 + 3191^2 .

It is a cyclic number.

It is not a de Polignac number, because 44404981 - 2¹ = 44404979 is a prime.

It is a super-2 number, since 2×44404981² = 3943604675220722, which contains 22 as substring.

Together with 44404979, it forms a pair of twin primes.

It is equal to p_2684329 and since 44404981 and 2684329 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44404961) 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, 22202490 + 22202491.

It is an arithmetic number, because the mean of its divisors is an integer number (22202491).

Almost surely, 2^44404981 is an apocalyptic number.

It is an amenable number.

44404981 is a deficient number, since it is larger than the sum of its proper divisors (1).

44404981 is an equidigital number, since it uses as much as digits as its factorization.

44404981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 44404981 is about 6663.7062510288. The cubic root of 44404981 is about 354.1146515968.

The spelling of 44404981 in words is "forty-four million, four hundred four thousand, nine hundred eighty-one".