41809513 has 2 divisors, whose sum is σ = 41809514. Its totient is φ = 41809512.

The previous prime is 41809487. The next prime is 41809529. The reversal of 41809513 is 31590814.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41434969 + 374544 = 6437^2 + 612^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41809513 is a prime.

It is equal to p_2536834 and since 41809513 and 2536834 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (41809013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20904756 + 20904757.

It is an arithmetic number, because the mean of its divisors is an integer number (20904757).

Almost surely, 2^41809513 is an apocalyptic number.

It is an amenable number.

41809513 is a deficient number, since it is larger than the sum of its proper divisors (1).

41809513 is an equidigital number, since it uses as much as digits as its factorization.

41809513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 41809513 is about 6466.0276058798. The cubic root of 41809513 is about 347.0763617597.

The spelling of 41809513 in words is "forty-one million, eight hundred nine thousand, five hundred thirteen".