41994509 has 2 divisors, whose sum is σ = 41994510. Its totient is φ = 41994508.

The previous prime is 41994499. The next prime is 41994551. The reversal of 41994509 is 90549914.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37478884 + 4515625 = 6122^2 + 2125^2 .

It is a cyclic number.

It is not a de Polignac number, because 41994509 - 2¹² = 41990413 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41994569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20997254 + 20997255.

It is an arithmetic number, because the mean of its divisors is an integer number (20997255).

Almost surely, 2^41994509 is an apocalyptic number.

It is an amenable number.

41994509 is a deficient number, since it is larger than the sum of its proper divisors (1).

41994509 is an equidigital number, since it uses as much as digits as its factorization.

41994509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 41994509 is about 6480.3170447132. The cubic root of 41994509 is about 347.5875155250.

The spelling of 41994509 in words is "forty-one million, nine hundred ninety-four thousand, five hundred nine".