41681309 has 2 divisors, whose sum is σ = 41681310. Its totient is φ = 41681308.

The previous prime is 41681261. The next prime is 41681327. The reversal of 41681309 is 90318614.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38477209 + 3204100 = 6203^2 + 1790^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41681309 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41681369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20840654 + 20840655.

It is an arithmetic number, because the mean of its divisors is an integer number (20840655).

Almost surely, 2^41681309 is an apocalyptic number.

It is an amenable number.

41681309 is a deficient number, since it is larger than the sum of its proper divisors (1).

41681309 is an equidigital number, since it uses as much as digits as its factorization.

41681309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 41681309 is about 6456.1063343164. The cubic root of 41681309 is about 346.7212421269.

The spelling of 41681309 in words is "forty-one million, six hundred eighty-one thousand, three hundred nine".