1368109189 has 2 divisors, whose sum is σ = 1368109190. Its totient is φ = 1368109188.

The previous prime is 1368109177. The next prime is 1368109213. The reversal of 1368109189 is 9819018631.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 901981089 + 466128100 = 30033^2 + 21590^2 .

It is an emirp because it is prime and its reverse (9819018631) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1368109189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1368109109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 684054594 + 684054595.

It is an arithmetic number, because the mean of its divisors is an integer number (684054595).

Almost surely, 2^1368109189 is an apocalyptic number.

It is an amenable number.

1368109189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1368109189 is an equidigital number, since it uses as much as digits as its factorization.

1368109189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 46.

The square root of 1368109189 is about 36987.9600545907. The cubic root of 1368109189 is about 1110.1293545649.

The spelling of 1368109189 in words is "one billion, three hundred sixty-eight million, one hundred nine thousand, one hundred eighty-nine".