1318848409 has 2 divisors, whose sum is σ = 1318848410. Its totient is φ = 1318848408.

The previous prime is 1318848403. The next prime is 1318848437. The reversal of 1318848409 is 9048488131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 855738009 + 463110400 = 29253^2 + 21520^2 .

It is a cyclic number.

It is not a de Polignac number, because 1318848409 - 2⁷ = 1318848281 is a prime.

It is a super-2 number, since 2×1318848409² = 3478722251843662562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1318848403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659424204 + 659424205.

It is an arithmetic number, because the mean of its divisors is an integer number (659424205).

Almost surely, 2^1318848409 is an apocalyptic number.

It is an amenable number.

1318848409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318848409 is an equidigital number, since it uses as much as digits as its factorization.

1318848409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 221184, while the sum is 46.

The square root of 1318848409 is about 36315.9525415485. The cubic root of 1318848409 is about 1096.6422149534.

The spelling of 1318848409 in words is "one billion, three hundred eighteen million, eight hundred forty-eight thousand, four hundred nine".