1311329485 has 4 divisors (see below), whose sum is σ = 1573595388. Its totient is φ = 1049063584.

The previous prime is 1311329473. The next prime is 1311329501. The reversal of 1311329485 is 5849231131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5849231131 = 23 ⋅254314397.

It can be written as a sum of positive squares in 2 ways, for example, as 368409636 + 942919849 = 19194^2 + 30707^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311329485 - 2⁹ = 1311328973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131132944 + ... + 131132953.

It is an arithmetic number, because the mean of its divisors is an integer number (393398847).

Almost surely, 2^1311329485 is an apocalyptic number.

It is an amenable number.

1311329485 is a deficient number, since it is larger than the sum of its proper divisors (262265903).

1311329485 is an equidigital number, since it uses as much as digits as its factorization.

1311329485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262265902.

The product of its digits is 25920, while the sum is 37.

The square root of 1311329485 is about 36212.2836203408. The cubic root of 1311329485 is about 1094.5542092568.

The spelling of 1311329485 in words is "one billion, three hundred eleven million, three hundred twenty-nine thousand, four hundred eighty-five".