44818981 has 2 divisors, whose sum is σ = 44818982. Its totient is φ = 44818980.

The previous prime is 44818933. The next prime is 44818999. The reversal of 44818981 is 18981844.

44818981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30636225 + 14182756 = 5535^2 + 3766^2 .

It is a cyclic number.

It is not a de Polignac number, because 44818981 - 2¹⁵ = 44786213 is a prime.

It is a super-2 number, since 2×44818981² = 4017482115756722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44818931) 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, 22409490 + 22409491.

It is an arithmetic number, because the mean of its divisors is an integer number (22409491).

Almost surely, 2^44818981 is an apocalyptic number.

It is an amenable number.

44818981 is a deficient number, since it is larger than the sum of its proper divisors (1).

44818981 is an equidigital number, since it uses as much as digits as its factorization.

44818981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73728, while the sum is 43.

The square root of 44818981 is about 6694.6979767574. The cubic root of 44818981 is about 355.2117522633.

It can be divided in two parts, 44 and 818981, that added together give a square (819025 = 905²).

The spelling of 44818981 in words is "forty-four million, eight hundred eighteen thousand, nine hundred eighty-one".