41081809 has 4 divisors (see below), whose sum is σ = 43498404. Its totient is φ = 38665216.

The previous prime is 41081801. The next prime is 41081827. The reversal of 41081809 is 90818014.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12960000 + 28121809 = 3600^2 + 5303^2 .

It is a cyclic number.

It is not a de Polignac number, because 41081809 - 2³ = 41081801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (41081801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1208272 + ... + 1208305.

It is an arithmetic number, because the mean of its divisors is an integer number (10874601).

Almost surely, 2^41081809 is an apocalyptic number.

It is an amenable number.

41081809 is a deficient number, since it is larger than the sum of its proper divisors (2416595).

41081809 is a wasteful number, since it uses less digits than its factorization.

41081809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2416594.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 41081809 is about 6409.5092635864. The cubic root of 41081809 is about 345.0509173606.

The spelling of 41081809 in words is "forty-one million, eighty-one thousand, eight hundred nine".