1311662399 has 2 divisors, whose sum is σ = 1311662400. Its totient is φ = 1311662398.

The previous prime is 1311662393. The next prime is 1311662437. The reversal of 1311662399 is 9932661131.

It is a weak prime.

It is an emirp because it is prime and its reverse (9932661131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1311662399 - 2⁴ = 1311662383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311662393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655831199 + 655831200.

It is an arithmetic number, because the mean of its divisors is an integer number (655831200).

Almost surely, 2^1311662399 is an apocalyptic number.

1311662399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311662399 is an equidigital number, since it uses as much as digits as its factorization.

1311662399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52488, while the sum is 41.

The square root of 1311662399 is about 36216.8800285171. The cubic root of 1311662399 is about 1094.6468281325.

The spelling of 1311662399 in words is "one billion, three hundred eleven million, six hundred sixty-two thousand, three hundred ninety-nine".