41688009 has 18 divisors (see below), whose sum is σ = 66189578. Its totient is φ = 25264800.

The previous prime is 41688001. The next prime is 41688019. The reversal of 41688009 is 90088614.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 41409225 + 278784 = 6435^2 + 528^2 .

It is not a de Polignac number, because 41688009 - 2³ = 41688001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (41688001) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 18052 + ... + 20229.

Almost surely, 2^41688009 is an apocalyptic number.

It is an amenable number.

41688009 is a deficient number, since it is larger than the sum of its proper divisors (24501569).

41688009 is a wasteful number, since it uses less digits than its factorization.

41688009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38309 (or 38295 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 41688009 is about 6456.6252020696. The cubic root of 41688009 is about 346.7398188616.

The spelling of 41688009 in words is "forty-one million, six hundred eighty-eight thousand, nine".