1313218903 has 2 divisors, whose sum is σ = 1313218904. Its totient is φ = 1313218902.

The previous prime is 1313218853. The next prime is 1313218909. The reversal of 1313218903 is 3098123131.

It is a strong prime.

It is an emirp because it is prime and its reverse (3098123131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1313218903 - 2⁹ = 1313218391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313218909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656609451 + 656609452.

It is an arithmetic number, because the mean of its divisors is an integer number (656609452).

Almost surely, 2^1313218903 is an apocalyptic number.

1313218903 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313218903 is an equidigital number, since it uses as much as digits as its factorization.

1313218903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 1313218903 is about 36238.3623112303. The cubic root of 1313218903 is about 1095.0796500376.

The spelling of 1313218903 in words is "one billion, three hundred thirteen million, two hundred eighteen thousand, nine hundred three".