636763 has 2 divisors, whose sum is σ = 636764. Its totient is φ = 636762.

The previous prime is 636761. The next prime is 636773. The reversal of 636763 is 367636.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 636763 - 2¹ = 636761 is a prime.

Together with 636761, it forms a pair of twin primes.

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

It is not a weakly prime, because it can be changed into another prime (636761) 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, 318381 + 318382.

It is an arithmetic number, because the mean of its divisors is an integer number (318382).

2⁶³⁶⁷⁶³ is an apocalyptic number.

636763 is a deficient number, since it is larger than the sum of its proper divisors (1).

636763 is an equidigital number, since it uses as much as digits as its factorization.

636763 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 31.

The square root of 636763 is about 797.9743103634. The cubic root of 636763 is about 86.0318522719.

The spelling of 636763 in words is "six hundred thirty-six thousand, seven hundred sixty-three".