1311002003 has 2 divisors, whose sum is σ = 1311002004. Its totient is φ = 1311002002.

The previous prime is 1311001987. The next prime is 1311002023. The reversal of 1311002003 is 3002001131.

It is a weak prime.

It is an emirp because it is prime and its reverse (3002001131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1311002003 - 2⁴ = 1311001987 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311002023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655501001 + 655501002.

It is an arithmetic number, because the mean of its divisors is an integer number (655501002).

Almost surely, 2^1311002003 is an apocalyptic number.

1311002003 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311002003 is an equidigital number, since it uses as much as digits as its factorization.

1311002003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1311002003 is about 36207.7616402892. The cubic root of 1311002003 is about 1094.4630863040.

Adding to 1311002003 its reverse (3002001131), we get a palindrome (4313003134).

The spelling of 1311002003 in words is "one billion, three hundred eleven million, two thousand, three".