1240018313 has 2 divisors, whose sum is σ = 1240018314. Its totient is φ = 1240018312.

The previous prime is 1240018291. The next prime is 1240018319. The reversal of 1240018313 is 3138100421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 882505849 + 357512464 = 29707^2 + 18908^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240018313 - 2¹⁴ = 1240001929 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1240018319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620009156 + 620009157.

It is an arithmetic number, because the mean of its divisors is an integer number (620009157).

Almost surely, 2^1240018313 is an apocalyptic number.

It is an amenable number.

1240018313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240018313 is an equidigital number, since it uses as much as digits as its factorization.

1240018313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1240018313 is about 35213.8937494847. The cubic root of 1240018313 is about 1074.3423597626.

Adding to 1240018313 its reverse (3138100421), we get a palindrome (4378118734).

The spelling of 1240018313 in words is "one billion, two hundred forty million, eighteen thousand, three hundred thirteen".