1368118909 has 2 divisors, whose sum is σ = 1368118910. Its totient is φ = 1368118908.

The previous prime is 1368118897. The next prime is 1368118937. The reversal of 1368118909 is 9098118631.

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., 1315512900 + 52606009 = 36270^2 + 7253^2 .

It is a cyclic number.

It is not a de Polignac number, because 1368118909 - 2⁹ = 1368118397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1368118949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 684059454 + 684059455.

It is an arithmetic number, because the mean of its divisors is an integer number (684059455).

Almost surely, 2^1368118909 is an apocalyptic number.

It is an amenable number.

1368118909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1368118909 is an equidigital number, since it uses as much as digits as its factorization.

1368118909 is an evil number, because the sum of its binary digits is even.

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

The square root of 1368118909 is about 36988.0914484649. The cubic root of 1368118909 is about 1110.1319836026.

The spelling of 1368118909 in words is "one billion, three hundred sixty-eight million, one hundred eighteen thousand, nine hundred nine".