41999891 has 2 divisors, whose sum is σ = 41999892. Its totient is φ = 41999890.

The previous prime is 41999869. The next prime is 41999939. The reversal of 41999891 is 19899914.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 41999891 - 2⁶ = 41999827 is a prime.

It is not a weakly prime, because it can be changed into another prime (41999831) 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, 20999945 + 20999946.

It is an arithmetic number, because the mean of its divisors is an integer number (20999946).

Almost surely, 2^41999891 is an apocalyptic number.

41999891 is a deficient number, since it is larger than the sum of its proper divisors (1).

41999891 is an equidigital number, since it uses as much as digits as its factorization.

41999891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 50.

The square root of 41999891 is about 6480.7322888698. The cubic root of 41999891 is about 347.6023637845.

The spelling of 41999891 in words is "forty-one million, nine hundred ninety-nine thousand, eight hundred ninety-one".