1138819859 has 2 divisors, whose sum is σ = 1138819860. Its totient is φ = 1138819858.

The previous prime is 1138819849. The next prime is 1138819873. The reversal of 1138819859 is 9589188311.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1138819859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1138819859.

It is not a weakly prime, because it can be changed into another prime (1138819819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569409929 + 569409930.

It is an arithmetic number, because the mean of its divisors is an integer number (569409930).

Almost surely, 2^1138819859 is an apocalyptic number.

1138819859 is a deficient number, since it is larger than the sum of its proper divisors (1).

1138819859 is an equidigital number, since it uses as much as digits as its factorization.

1138819859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 53.

The square root of 1138819859 is about 33746.4051270650. The cubic root of 1138819859 is about 1044.2833265926.

The spelling of 1138819859 in words is "one billion, one hundred thirty-eight million, eight hundred nineteen thousand, eight hundred fifty-nine".