41981549 has 2 divisors, whose sum is σ = 41981550. Its totient is φ = 41981548.

The previous prime is 41981539. The next prime is 41981573. The reversal of 41981549 is 94518914.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24700900 + 17280649 = 4970^2 + 4157^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41981549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41981539) by changing a digit.

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, 20990774 + 20990775.

It is an arithmetic number, because the mean of its divisors is an integer number (20990775).

Almost surely, 2^41981549 is an apocalyptic number.

It is an amenable number.

41981549 is a deficient number, since it is larger than the sum of its proper divisors (1).

41981549 is an equidigital number, since it uses as much as digits as its factorization.

41981549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 41.

The square root of 41981549 is about 6479.3170164764. The cubic root of 41981549 is about 347.5517553126.

The spelling of 41981549 in words is "forty-one million, nine hundred eighty-one thousand, five hundred forty-nine".