1240434031313 has 2 divisors, whose sum is σ = 1240434031314. Its totient is φ = 1240434031312.

The previous prime is 1240434031303. The next prime is 1240434031379. The reversal of 1240434031313 is 3131304340421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1234003274449 + 6430756864 = 1110857^2 + 80192^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240434031313 - 2⁴ = 1240434031297 is a prime.

It is not a weakly prime, because it can be changed into another prime (1240434031303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620217015656 + 620217015657.

It is an arithmetic number, because the mean of its divisors is an integer number (620217015657).

Almost surely, 2^{1240434031313} is an apocalyptic number.

It is an amenable number.

1240434031313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240434031313 is an equidigital number, since it uses as much as digits as its factorization.

1240434031313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 1240434031313 its reverse (3131304340421), we get a palindrome (4371738371734).

The spelling of 1240434031313 in words is "one trillion, two hundred forty billion, four hundred thirty-four million, thirty-one thousand, three hundred thirteen".