409742149 has 2 divisors, whose sum is σ = 409742150. Its totient is φ = 409742148.

The previous prime is 409742129. The next prime is 409742173. The reversal of 409742149 is 941247904.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240560100 + 169182049 = 15510^2 + 13007^2 .

It is a cyclic number.

It is not a de Polignac number, because 409742149 - 2¹⁵ = 409709381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409742129) 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, 204871074 + 204871075.

It is an arithmetic number, because the mean of its divisors is an integer number (204871075).

Almost surely, 2^409742149 is an apocalyptic number.

It is an amenable number.

409742149 is a deficient number, since it is larger than the sum of its proper divisors (1).

409742149 is an equidigital number, since it uses as much as digits as its factorization.

409742149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 409742149 is about 20242.0885533089. The cubic root of 409742149 is about 742.7401145369.

The spelling of 409742149 in words is "four hundred nine million, seven hundred forty-two thousand, one hundred forty-nine".