1287286673 has 2 divisors, whose sum is σ = 1287286674. Its totient is φ = 1287286672.

The previous prime is 1287286579. The next prime is 1287286723. The reversal of 1287286673 is 3766827821.

It is an a-pointer prime, because the next prime (1287286723) can be obtained adding 1287286673 to its sum of digits (50).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 878114689 + 409171984 = 29633^2 + 20228^2 .

It is a cyclic number.

It is not a de Polignac number, because 1287286673 - 2¹⁴ = 1287270289 is a prime.

It is not a weakly prime, because it can be changed into another prime (1287246673) 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, 643643336 + 643643337.

It is an arithmetic number, because the mean of its divisors is an integer number (643643337).

Almost surely, 2^1287286673 is an apocalyptic number.

It is an amenable number.

1287286673 is a deficient number, since it is larger than the sum of its proper divisors (1).

1287286673 is an equidigital number, since it uses as much as digits as its factorization.

1287286673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 50.

The square root of 1287286673 is about 35878.7774735985. Note that the first 3 decimals coincide. The cubic root of 1287286673 is about 1087.8234695141.

The spelling of 1287286673 in words is "one billion, two hundred eighty-seven million, two hundred eighty-six thousand, six hundred seventy-three".