1311303005 has 16 divisors (see below), whose sum is σ = 1630817280. Its totient is φ = 1011006528.

The previous prime is 1311303001. The next prime is 1311303023. The reversal of 1311303005 is 5003031131.

It is a cyclic number.

It is not a de Polignac number, because 1311303005 - 2² = 1311303001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311303001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73604 + ... + 89666.

It is an arithmetic number, because the mean of its divisors is an integer number (101926080).

Almost surely, 2^1311303005 is an apocalyptic number.

It is an amenable number.

1311303005 is a deficient number, since it is larger than the sum of its proper divisors (319514275).

1311303005 is a wasteful number, since it uses less digits than its factorization.

1311303005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16660.

The product of its (nonzero) digits is 135, while the sum is 17.

The square root of 1311303005 is about 36211.9179967038. The cubic root of 1311303005 is about 1094.5468416728.

Adding to 1311303005 its reverse (5003031131), we get a palindrome (6314334136).

The spelling of 1311303005 in words is "one billion, three hundred eleven million, three hundred three thousand, five".