41809891 has 2 divisors, whose sum is σ = 41809892. Its totient is φ = 41809890.

The previous prime is 41809879. The next prime is 41809903. The reversal of 41809891 is 19890814.

It is a balanced prime because it is at equal distance from previous prime (41809879) and next prime (41809903).

It is a cyclic number.

It is not a de Polignac number, because 41809891 - 2⁷ = 41809763 is a prime.

It is not a weakly prime, because it can be changed into another prime (41809871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20904945 + 20904946.

It is an arithmetic number, because the mean of its divisors is an integer number (20904946).

Almost surely, 2^41809891 is an apocalyptic number.

41809891 is a deficient number, since it is larger than the sum of its proper divisors (1).

41809891 is an equidigital number, since it uses as much as digits as its factorization.

41809891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 41809891 is about 6466.0568355065. The cubic root of 41809891 is about 347.0774077295.

The spelling of 41809891 in words is "forty-one million, eight hundred nine thousand, eight hundred ninety-one".