636085673 has 2 divisors, whose sum is σ = 636085674. Its totient is φ = 636085672.

The previous prime is 636085649. The next prime is 636085687. The reversal of 636085673 is 376580636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 530242729 + 105842944 = 23027^2 + 10288^2 .

It is a cyclic number.

It is not a de Polignac number, because 636085673 - 2⁶ = 636085609 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (636085633) 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, 318042836 + 318042837.

It is an arithmetic number, because the mean of its divisors is an integer number (318042837).

Almost surely, 2^636085673 is an apocalyptic number.

It is an amenable number.

636085673 is a deficient number, since it is larger than the sum of its proper divisors (1).

636085673 is an equidigital number, since it uses as much as digits as its factorization.

636085673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 44.

The square root of 636085673 is about 25220.7389463513. The cubic root of 636085673 is about 860.0133732371.

The spelling of 636085673 in words is "six hundred thirty-six million, eighty-five thousand, six hundred seventy-three".