1312693 has 4 divisors (see below), whose sum is σ = 1314988. Its totient is φ = 1310400.

The previous prime is 1312681. The next prime is 1312733. The reversal of 1312693 is 3962131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3962131 = 503 ⋅7877.

It can be written as a sum of positive squares in 2 ways, for example, as 603729 + 708964 = 777^2 + 842^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312693 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 (1312603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 493 + ... + 1693.

It is an arithmetic number, because the mean of its divisors is an integer number (328747).

2^1312693 is an apocalyptic number.

It is an amenable number.

1312693 is a deficient number, since it is larger than the sum of its proper divisors (2295).

1312693 is a wasteful number, since it uses less digits than its factorization.

1312693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2294.

The product of its digits is 972, while the sum is 25.

The square root of 1312693 is about 1145.7281527483. The cubic root of 1312693 is about 109.4933448830.

The spelling of 1312693 in words is "one million, three hundred twelve thousand, six hundred ninety-three".