1243746743 has 2 divisors, whose sum is σ = 1243746744. Its totient is φ = 1243746742.

The previous prime is 1243746737. The next prime is 1243746761. The reversal of 1243746743 is 3476473421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1243746743 - 2²⁶ = 1176637879 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1243746743.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1243746703) 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, 621873371 + 621873372.

It is an arithmetic number, because the mean of its divisors is an integer number (621873372).

Almost surely, 2^1243746743 is an apocalyptic number.

1243746743 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243746743 is an equidigital number, since it uses as much as digits as its factorization.

1243746743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 41.

The square root of 1243746743 is about 35266.7937726128. The cubic root of 1243746743 is about 1075.4180434325.

The spelling of 1243746743 in words is "one billion, two hundred forty-three million, seven hundred forty-six thousand, seven hundred forty-three".