1287487963 has 2 divisors, whose sum is σ = 1287487964. Its totient is φ = 1287487962.

The previous prime is 1287487921. The next prime is 1287487969. The reversal of 1287487963 is 3697847821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1287487963 - 2¹³ = 1287479771 is a prime.

It is not a weakly prime, because it can be changed into another prime (1287487969) 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, 643743981 + 643743982.

It is an arithmetic number, because the mean of its divisors is an integer number (643743982).

Almost surely, 2^1287487963 is an apocalyptic number.

1287487963 is a deficient number, since it is larger than the sum of its proper divisors (1).

1287487963 is an equidigital number, since it uses as much as digits as its factorization.

1287487963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4064256, while the sum is 55.

The square root of 1287487963 is about 35881.5825041204. The cubic root of 1287487963 is about 1087.8801666944.

The spelling of 1287487963 in words is "one billion, two hundred eighty-seven million, four hundred eighty-seven thousand, nine hundred sixty-three".