1287170803 has 2 divisors, whose sum is σ = 1287170804. Its totient is φ = 1287170802.

The previous prime is 1287170749. The next prime is 1287170813. The reversal of 1287170803 is 3080717821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1287170803 is a prime.

It is not a weakly prime, because it can be changed into another prime (1287170813) 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, 643585401 + 643585402.

It is an arithmetic number, because the mean of its divisors is an integer number (643585402).

Almost surely, 2^1287170803 is an apocalyptic number.

1287170803 is a deficient number, since it is larger than the sum of its proper divisors (1).

1287170803 is an equidigital number, since it uses as much as digits as its factorization.

1287170803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 1287170803 is about 35877.1626943938. The cubic root of 1287170803 is about 1087.7908298309.

The spelling of 1287170803 in words is "one billion, two hundred eighty-seven million, one hundred seventy thousand, eight hundred three".