1144660409 has 2 divisors, whose sum is σ = 1144660410. Its totient is φ = 1144660408.

The previous prime is 1144660403. The next prime is 1144660411. The reversal of 1144660409 is 9040664411.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1142778025 + 1882384 = 33805^2 + 1372^2 .

It is a cyclic number.

It is not a de Polignac number, because 1144660409 - 2¹² = 1144656313 is a prime.

Together with 1144660411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1144660403) 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, 572330204 + 572330205.

It is an arithmetic number, because the mean of its divisors is an integer number (572330205).

Almost surely, 2^1144660409 is an apocalyptic number.

It is an amenable number.

1144660409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1144660409 is an equidigital number, since it uses as much as digits as its factorization.

1144660409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 1144660409 is about 33832.8303427307. The cubic root of 1144660409 is about 1046.0655200267.

The spelling of 1144660409 in words is "one billion, one hundred forty-four million, six hundred sixty thousand, four hundred nine".