409134785 has 4 divisors (see below), whose sum is σ = 490961748. Its totient is φ = 327307824.

The previous prime is 409134757. The next prime is 409134827. The reversal of 409134785 is 587431904.

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 140469904 + 268664881 = 11852^2 + 16391^2 .

It is a cyclic number.

It is not a de Polignac number, because 409134785 - 2¹⁸ = 408872641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 40913474 + ... + 40913483.

It is an arithmetic number, because the mean of its divisors is an integer number (122740437).

Almost surely, 2^409134785 is an apocalyptic number.

It is an amenable number.

409134785 is a deficient number, since it is larger than the sum of its proper divisors (81826963).

409134785 is an equidigital number, since it uses as much as digits as its factorization.

409134785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81826962.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 409134785 is about 20227.0804863183. The cubic root of 409134785 is about 742.3729432250.

The spelling of 409134785 in words is "four hundred nine million, one hundred thirty-four thousand, seven hundred eighty-five".