409440533 has 2 divisors, whose sum is σ = 409440534. Its totient is φ = 409440532.

The previous prime is 409440523. The next prime is 409440541. The reversal of 409440533 is 335044904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 400720324 + 8720209 = 20018^2 + 2953^2 .

It is a cyclic number.

It is not a de Polignac number, because 409440533 - 2⁶ = 409440469 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 409440533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409440523) 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 as a sum of consecutive naturals, namely, 204720266 + 204720267.

It is an arithmetic number, because the mean of its divisors is an integer number (204720267).

Almost surely, 2^409440533 is an apocalyptic number.

It is an amenable number.

409440533 is a deficient number, since it is larger than the sum of its proper divisors (1).

409440533 is an equidigital number, since it uses as much as digits as its factorization.

409440533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 409440533 is about 20234.6369623969. The cubic root of 409440533 is about 742.5578232317.

The spelling of 409440533 in words is "four hundred nine million, four hundred forty thousand, five hundred thirty-three".