636304423 has 2 divisors, whose sum is σ = 636304424. Its totient is φ = 636304422.

The previous prime is 636304397. The next prime is 636304447. The reversal of 636304423 is 324403636.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 636304423 - 2¹³ = 636296231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (636304523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318152211 + 318152212.

It is an arithmetic number, because the mean of its divisors is an integer number (318152212).

Almost surely, 2^636304423 is an apocalyptic number.

636304423 is a deficient number, since it is larger than the sum of its proper divisors (1).

636304423 is an equidigital number, since it uses as much as digits as its factorization.

636304423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 31.

The square root of 636304423 is about 25225.0752823455. The cubic root of 636304423 is about 860.1119481995. Note that the first 3 decimals are identical.

The spelling of 636304423 in words is "six hundred thirty-six million, three hundred four thousand, four hundred twenty-three".