409530109 has 2 divisors, whose sum is σ = 409530110. Its totient is φ = 409530108.

The previous prime is 409530091. The next prime is 409530227. The reversal of 409530109 is 901035904.

Together with previous prime (409530091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 408161209 + 1368900 = 20203^2 + 1170^2 .

It is a cyclic number.

It is not a de Polignac number, because 409530109 - 2¹⁷ = 409399037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409530809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204765054 + 204765055.

It is an arithmetic number, because the mean of its divisors is an integer number (204765055).

Almost surely, 2^409530109 is an apocalyptic number.

It is an amenable number.

409530109 is a deficient number, since it is larger than the sum of its proper divisors (1).

409530109 is an equidigital number, since it uses as much as digits as its factorization.

409530109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 409530109 is about 20236.8502736963. The cubic root of 409530109 is about 742.6119707038.

The spelling of 409530109 in words is "four hundred nine million, five hundred thirty thousand, one hundred nine".