409145717 has 8 divisors (see below), whose sum is σ = 423671040. Its totient is φ = 394648240.

The previous prime is 409145701. The next prime is 409145747. The reversal of 409145717 is 717541904.

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

It is not a de Polignac number, because 409145717 - 2⁴ = 409145701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409145747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25592 + ... + 38382.

It is an arithmetic number, because the mean of its divisors is an integer number (52958880).

Almost surely, 2^409145717 is an apocalyptic number.

It is an amenable number.

409145717 is a deficient number, since it is larger than the sum of its proper divisors (14525323).

409145717 is a wasteful number, since it uses less digits than its factorization.

409145717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13923.

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 409145717 is about 20227.3507162950. The cubic root of 409145717 is about 742.3795551852.

The spelling of 409145717 in words is "four hundred nine million, one hundred forty-five thousand, seven hundred seventeen".