41985709 has 2 divisors, whose sum is σ = 41985710. Its totient is φ = 41985708.

The previous prime is 41985689. The next prime is 41985719. The reversal of 41985709 is 90758914.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27008809 + 14976900 = 5197^2 + 3870^2 .

It is a cyclic number.

It is not a de Polignac number, because 41985709 - 2⁵ = 41985677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41985719) 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, 20992854 + 20992855.

It is an arithmetic number, because the mean of its divisors is an integer number (20992855).

Almost surely, 2^41985709 is an apocalyptic number.

It is an amenable number.

41985709 is a deficient number, since it is larger than the sum of its proper divisors (1).

41985709 is an equidigital number, since it uses as much as digits as its factorization.

41985709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 41985709 is about 6479.6380300137. The cubic root of 41985709 is about 347.5632347012.

The spelling of 41985709 in words is "forty-one million, nine hundred eighty-five thousand, seven hundred nine".