40917409 has 8 divisors (see below), whose sum is σ = 44208360. Its totient is φ = 37646976.

The previous prime is 40917407. The next prime is 40917421. The reversal of 40917409 is 90471904.

It can be written as a sum of positive squares in 4 ways, for example, as 2166784 + 38750625 = 1472^2 + 6225^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40917409 - 2¹ = 40917407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40917407) 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 in 7 ways as a sum of consecutive naturals, for example, 844 + ... + 9085.

It is an arithmetic number, because the mean of its divisors is an integer number (5526045).

Almost surely, 2^40917409 is an apocalyptic number.

It is an amenable number.

40917409 is a deficient number, since it is larger than the sum of its proper divisors (3290951).

40917409 is a wasteful number, since it uses less digits than its factorization.

40917409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10259.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 40917409 is about 6396.6717126956. The cubic root of 40917409 is about 344.5900304172.

The spelling of 40917409 in words is "forty million, nine hundred seventeen thousand, four hundred nine".