1368509 has 2 divisors, whose sum is σ = 1368510. Its totient is φ = 1368508.

The previous prime is 1368491. The next prime is 1368527. The reversal of 1368509 is 9058631.

It is a balanced prime because it is at equal distance from previous prime (1368491) and next prime (1368527).

It can be written as a sum of positive squares in only one way, i.e., 1315609 + 52900 = 1147^2 + 230^2 .

It is an emirp because it is prime and its reverse (9058631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1368509 - 2⁸ = 1368253 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1368529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 684254 + 684255.

It is an arithmetic number, because the mean of its divisors is an integer number (684255).

2^1368509 is an apocalyptic number.

It is an amenable number.

1368509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1368509 is an equidigital number, since it uses as much as digits as its factorization.

1368509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 1368509 is about 1169.8328940494. The cubic root of 1368509 is about 111.0237484019.

The spelling of 1368509 in words is "one million, three hundred sixty-eight thousand, five hundred nine".