1240433213 has 2 divisors, whose sum is σ = 1240433214. Its totient is φ = 1240433212.

The previous prime is 1240433197. The next prime is 1240433219. The reversal of 1240433213 is 3123340421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1077283684 + 163149529 = 32822^2 + 12773^2 .

It is an emirp because it is prime and its reverse (3123340421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1240433213 - 2⁴ = 1240433197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240433219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620216606 + 620216607.

It is an arithmetic number, because the mean of its divisors is an integer number (620216607).

Almost surely, 2^1240433213 is an apocalyptic number.

It is an amenable number.

1240433213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240433213 is an equidigital number, since it uses as much as digits as its factorization.

1240433213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1240433213 is about 35219.7843974094. The cubic root of 1240433213 is about 1074.4621684610.

Adding to 1240433213 its reverse (3123340421), we get a palindrome (4363773634).

The spelling of 1240433213 in words is "one billion, two hundred forty million, four hundred thirty-three thousand, two hundred thirteen".