1311796493 has 12 divisors (see below), whose sum is σ = 1526943132. Its totient is φ = 1123678080.

The previous prime is 1311796471. The next prime is 1311796511. The reversal of 1311796493 is 3946971131.

It can be written as a sum of positive squares in 2 ways, for example, as 667550569 + 644245924 = 25837^2 + 25382^2 .

It is not a de Polignac number, because 1311796493 - 2¹⁰ = 1311795469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311793493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77621 + ... + 92997.

It is an arithmetic number, because the mean of its divisors is an integer number (127245261).

Almost surely, 2^1311796493 is an apocalyptic number.

It is an amenable number.

1311796493 is a deficient number, since it is larger than the sum of its proper divisors (215146639).

1311796493 is a wasteful number, since it uses less digits than its factorization.

1311796493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17132 (or 17125 counting only the distinct ones).

The product of its digits is 122472, while the sum is 44.

The square root of 1311796493 is about 36218.7312450340. The cubic root of 1311796493 is about 1094.6841295423.

The spelling of 1311796493 in words is "one billion, three hundred eleven million, seven hundred ninety-six thousand, four hundred ninety-three".