1368643 has 2 divisors, whose sum is σ = 1368644. Its totient is φ = 1368642.

The previous prime is 1368617. The next prime is 1368659. The reversal of 1368643 is 3468631.

It is a strong prime.

It is an emirp because it is prime and its reverse (3468631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1368643 - 2¹³ = 1360451 is a prime.

It is a super-2 number, since 2×1368643² = 3746367322898, which contains 22 as substring.

1368643 is a lucky number.

It is a nialpdrome in base 11.

It is not a weakly prime, because it can be changed into another prime (1368673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 684321 + 684322.

It is an arithmetic number, because the mean of its divisors is an integer number (684322).

2^1368643 is an apocalyptic number.

1368643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1368643 is an equidigital number, since it uses as much as digits as its factorization.

1368643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 31.

The square root of 1368643 is about 1169.8901657848. The cubic root of 1368643 is about 111.0273719797.

The spelling of 1368643 in words is "one million, three hundred sixty-eight thousand, six hundred forty-three".