1287733243 has 2 divisors, whose sum is σ = 1287733244. Its totient is φ = 1287733242.

The previous prime is 1287733219. The next prime is 1287733261. The reversal of 1287733243 is 3423377821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1287733243 - 2⁹ = 1287732731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1287733196 and 1287733205.

It is not a weakly prime, because it can be changed into another prime (1287731243) 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, 643866621 + 643866622.

It is an arithmetic number, because the mean of its divisors is an integer number (643866622).

Almost surely, 2^1287733243 is an apocalyptic number.

1287733243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1287733243 is an equidigital number, since it uses as much as digits as its factorization.

1287733243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 40.

The square root of 1287733243 is about 35885.0002508012. Note that the first 3 decimals coincide. The cubic root of 1287733243 is about 1087.9492465129.

The spelling of 1287733243 in words is "one billion, two hundred eighty-seven million, seven hundred thirty-three thousand, two hundred forty-three".