1318240361 has 2 divisors, whose sum is σ = 1318240362. Its totient is φ = 1318240360.

The previous prime is 1318240337. The next prime is 1318240381. The reversal of 1318240361 is 1630428131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 809061136 + 509179225 = 28444^2 + 22565^2 .

It is a cyclic number.

It is not a de Polignac number, because 1318240361 - 2¹⁰ = 1318239337 is a prime.

It is not a weakly prime, because it can be changed into another prime (1318240381) 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, 659120180 + 659120181.

It is an arithmetic number, because the mean of its divisors is an integer number (659120181).

Almost surely, 2^1318240361 is an apocalyptic number.

It is an amenable number.

1318240361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318240361 is an equidigital number, since it uses as much as digits as its factorization.

1318240361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1318240361 is about 36307.5799386299. The cubic root of 1318240361 is about 1096.4736553717.

Adding to 1318240361 its reverse (1630428131), we get a palindrome (2948668492).

The spelling of 1318240361 in words is "one billion, three hundred eighteen million, two hundred forty thousand, three hundred sixty-one".