1311799 has 2 divisors, whose sum is σ = 1311800. Its totient is φ = 1311798.

The previous prime is 1311797. The next prime is 1311829. The reversal of 1311799 is 9971131.

It is a weak prime.

It is an emirp because it is prime and its reverse (9971131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1311799 - 2¹ = 1311797 is a prime.

Together with 1311797, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1311799.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655899 + 655900.

It is an arithmetic number, because the mean of its divisors is an integer number (655900).

2^1311799 is an apocalyptic number.

1311799 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311799 is an equidigital number, since it uses as much as digits as its factorization.

1311799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1701, while the sum is 31.

The square root of 1311799 is about 1145.3379413955. The cubic root of 1311799 is about 109.4684826899.

The spelling of 1311799 in words is "one million, three hundred eleven thousand, seven hundred ninety-nine".