41989391 has 2 divisors, whose sum is σ = 41989392. Its totient is φ = 41989390.

The previous prime is 41989357. The next prime is 41989393. The reversal of 41989391 is 19398914.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 41989391 - 2⁶ = 41989327 is a prime.

Together with 41989393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41989393) 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, 20994695 + 20994696.

It is an arithmetic number, because the mean of its divisors is an integer number (20994696).

Almost surely, 2^41989391 is an apocalyptic number.

41989391 is a deficient number, since it is larger than the sum of its proper divisors (1).

41989391 is an equidigital number, since it uses as much as digits as its factorization.

41989391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 44.

The square root of 41989391 is about 6479.9221445940. The cubic root of 41989391 is about 347.5733944314.

The spelling of 41989391 in words is "forty-one million, nine hundred eighty-nine thousand, three hundred ninety-one".