1389811799 has 2 divisors, whose sum is σ = 1389811800. Its totient is φ = 1389811798.

The previous prime is 1389811789. The next prime is 1389811877. The reversal of 1389811799 is 9971189831.

It is a weak prime.

It is an emirp because it is prime and its reverse (9971189831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1389811799 - 2¹⁶ = 1389746263 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1389811769) 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, 694905899 + 694905900.

It is an arithmetic number, because the mean of its divisors is an integer number (694905900).

Almost surely, 2^1389811799 is an apocalyptic number.

1389811799 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389811799 is an equidigital number, since it uses as much as digits as its factorization.

1389811799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 56.

The square root of 1389811799 is about 37280.1797071849. The cubic root of 1389811799 is about 1115.9686593268.

The spelling of 1389811799 in words is "one billion, three hundred eighty-nine million, eight hundred eleven thousand, seven hundred ninety-nine".