1311338995 has 8 divisors (see below), whose sum is σ = 1592566416. Its totient is φ = 1036431456.

The previous prime is 1311338989. The next prime is 1311339061. The reversal of 1311338995 is 5998331131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311338995 is a prime.

It is a super-2 number, since 2×1311338995² = 3439219919615220050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 1579512 + ... + 1580341.

It is an arithmetic number, because the mean of its divisors is an integer number (199070802).

Almost surely, 2^1311338995 is an apocalyptic number.

1311338995 is a deficient number, since it is larger than the sum of its proper divisors (281227421).

1311338995 is an equidigital number, since it uses as much as digits as its factorization.

1311338995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3159941.

The product of its digits is 87480, while the sum is 43.

The square root of 1311338995 is about 36212.4149291372. The cubic root of 1311338995 is about 1094.5568552192.

The spelling of 1311338995 in words is "one billion, three hundred eleven million, three hundred thirty-eight thousand, nine hundred ninety-five".