636343 has 2 divisors, whose sum is σ = 636344. Its totient is φ = 636342.

The previous prime is 636331. The next prime is 636353. The reversal of 636343 is 343636.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-636343 is a prime.

It is a d-powerful number, because it can be written as 6 + 3⁹ + 3¹¹ + 6³ + 4⁹ + 3¹¹ .

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (636313) 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, 318171 + 318172.

It is an arithmetic number, because the mean of its divisors is an integer number (318172).

2⁶³⁶³⁴³ is an apocalyptic number.

636343 is a deficient number, since it is larger than the sum of its proper divisors (1).

636343 is an equidigital number, since it uses as much as digits as its factorization.

636343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 25.

The square root of 636343 is about 797.7111005872. The cubic root of 636343 is about 86.0129329748.

Adding to 636343 its reverse (343636), we get a palindrome (979979).

It can be divided in two parts, 636 and 343, that added together give a palindrome (979).

The spelling of 636343 in words is "six hundred thirty-six thousand, three hundred forty-three".