636043 has 2 divisors, whose sum is σ = 636044. Its totient is φ = 636042.

The previous prime is 636023. The next prime is 636059. The reversal of 636043 is 340636.

636043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-636043 is a prime.

It is not a weakly prime, because it can be changed into another prime (636023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318021 + 318022.

It is an arithmetic number, because the mean of its divisors is an integer number (318022).

2⁶³⁶⁰⁴³ is an apocalyptic number.

636043 is a deficient number, since it is larger than the sum of its proper divisors (1).

636043 is an equidigital number, since it uses as much as digits as its factorization.

636043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 636043 is about 797.5230404195. The cubic root of 636043 is about 85.9994140937. Note that the first 3 decimals are identical.

Adding to 636043 its reverse (340636), we get a palindrome (976679).

The spelling of 636043 in words is "six hundred thirty-six thousand, forty-three".