409138043 has 2 divisors, whose sum is σ = 409138044. Its totient is φ = 409138042.

The previous prime is 409138027. The next prime is 409138049. The reversal of 409138043 is 340831904.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 409138043 - 2⁴ = 409138027 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (409138049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204569021 + 204569022.

It is an arithmetic number, because the mean of its divisors is an integer number (204569022).

Almost surely, 2^409138043 is an apocalyptic number.

409138043 is a deficient number, since it is larger than the sum of its proper divisors (1).

409138043 is an equidigital number, since it uses as much as digits as its factorization.

409138043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 409138043 is about 20227.1610217549. The cubic root of 409138043 is about 742.3749137612.

Adding to 409138043 its reverse (340831904), we get a palindrome (749969947).

The spelling of 409138043 in words is "four hundred nine million, one hundred thirty-eight thousand, forty-three".