1005144409 has 2 divisors, whose sum is σ = 1005144410. Its totient is φ = 1005144408.

The previous prime is 1005144391. The next prime is 1005144449. The reversal of 1005144409 is 9044415001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 713691225 + 291453184 = 26715^2 + 17072^2 .

It is a cyclic number.

It is not a de Polignac number, because 1005144409 - 2⁵ = 1005144377 is a prime.

It is not a weakly prime, because it can be changed into another prime (1005144449) 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, 502572204 + 502572205.

It is an arithmetic number, because the mean of its divisors is an integer number (502572205).

Almost surely, 2^1005144409 is an apocalyptic number.

It is an amenable number.

1005144409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1005144409 is an equidigital number, since it uses as much as digits as its factorization.

1005144409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1005144409 is about 31704.0125063059. The cubic root of 1005144409 is about 1001.7118708261.

The spelling of 1005144409 in words is "one billion, five million, one hundred forty-four thousand, four hundred nine".