1287383873 has 2 divisors, whose sum is σ = 1287383874. Its totient is φ = 1287383872.

The previous prime is 1287383869. The next prime is 1287383879. The reversal of 1287383873 is 3783837821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1276775824 + 10608049 = 35732^2 + 3257^2 .

It is a cyclic number.

It is not a de Polignac number, because 1287383873 - 2² = 1287383869 is a prime.

It is not a weakly prime, because it can be changed into another prime (1287383879) 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, 643691936 + 643691937.

It is an arithmetic number, because the mean of its divisors is an integer number (643691937).

Almost surely, 2^1287383873 is an apocalyptic number.

It is an amenable number.

1287383873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1287383873 is an equidigital number, since it uses as much as digits as its factorization.

1287383873 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 1287383873 is about 35880.1320092332. The cubic root of 1287383873 is about 1087.8508484920.

The spelling of 1287383873 in words is "one billion, two hundred eighty-seven million, three hundred eighty-three thousand, eight hundred seventy-three".