1311383 has 2 divisors, whose sum is σ = 1311384. Its totient is φ = 1311382.

The previous prime is 1311377. The next prime is 1311403. The reversal of 1311383 is 3831131.

It is a happy number.

It is an a-pointer prime, because the next prime (1311403) can be obtained adding 1311383 to its sum of digits (20).

It is a weak prime.

It is an emirp because it is prime and its reverse (3831131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1311383 - 2⁴ = 1311367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655691 + 655692.

It is an arithmetic number, because the mean of its divisors is an integer number (655692).

2^1311383 is an apocalyptic number.

1311383 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311383 is an equidigital number, since it uses as much as digits as its factorization.

1311383 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 20.

The square root of 1311383 is about 1145.1563212068. The cubic root of 1311383 is about 109.4569098541.

The spelling of 1311383 in words is "one million, three hundred eleven thousand, three hundred eighty-three".