44149381 has 2 divisors, whose sum is σ = 44149382. Its totient is φ = 44149380.

The previous prime is 44149379. The next prime is 44149393. The reversal of 44149381 is 18394144.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41796225 + 2353156 = 6465^2 + 1534^2 .

It is a cyclic number.

It is not a de Polignac number, because 44149381 - 2¹ = 44149379 is a prime.

It is a super-2 number, since 2×44149381² = 3898335685366322, which contains 22 as substring.

Together with 44149379, it forms a pair of twin primes.

It is the 6645-th Hogben number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44149361) by changing a digit.

It is a nontrivial repunit in base 6644.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22074690 + 22074691.

It is an arithmetic number, because the mean of its divisors is an integer number (22074691).

Almost surely, 2^44149381 is an apocalyptic number.

It is an amenable number.

44149381 is a deficient number, since it is larger than the sum of its proper divisors (1).

44149381 is an equidigital number, since it uses as much as digits as its factorization.

44149381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 34.

The square root of 44149381 is about 6644.5000564377. The cubic root of 44149381 is about 353.4339026843.

The spelling of 44149381 in words is "forty-four million, one hundred forty-nine thousand, three hundred eighty-one".