409069849 has 2 divisors, whose sum is σ = 409069850. Its totient is φ = 409069848.

The previous prime is 409069819. The next prime is 409069877. The reversal of 409069849 is 948960904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 382906624 + 26163225 = 19568^2 + 5115^2 .

It is a cyclic number.

It is not a de Polignac number, because 409069849 - 2¹⁹ = 408545561 is a prime.

It is not a weakly prime, because it can be changed into another prime (409069819) 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, 204534924 + 204534925.

It is an arithmetic number, because the mean of its divisors is an integer number (204534925).

Almost surely, 2^409069849 is an apocalyptic number.

It is an amenable number.

409069849 is a deficient number, since it is larger than the sum of its proper divisors (1).

409069849 is an equidigital number, since it uses as much as digits as its factorization.

409069849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 49.

The square root of 409069849 is about 20225.4752478156. The cubic root of 409069849 is about 742.3336658020. Note that the first 3 decimals are identical.

The spelling of 409069849 in words is "four hundred nine million, sixty-nine thousand, eight hundred forty-nine".