1311520003 has 2 divisors, whose sum is σ = 1311520004. Its totient is φ = 1311520002.

The previous prime is 1311519977. The next prime is 1311520009. The reversal of 1311520003 is 3000251131.

It is a strong prime.

It is an emirp because it is prime and its reverse (3000251131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1311520003 - 2⁹ = 1311519491 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311520009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655760001 + 655760002.

It is an arithmetic number, because the mean of its divisors is an integer number (655760002).

Almost surely, 2^1311520003 is an apocalyptic number.

1311520003 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311520003 is an equidigital number, since it uses as much as digits as its factorization.

1311520003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 1311520003 is about 36214.9140962670. The cubic root of 1311520003 is about 1094.6072145422.

Adding to 1311520003 its reverse (3000251131), we get a palindrome (4311771134).

The spelling of 1311520003 in words is "one billion, three hundred eleven million, five hundred twenty thousand, three".