636673 has 2 divisors, whose sum is σ = 636674. Its totient is φ = 636672.

The previous prime is 636653. The next prime is 636697. The reversal of 636673 is 376636.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 627264 + 9409 = 792^2 + 97^2 .

It is a cyclic number.

It is not a de Polignac number, because 636673 - 2¹⁷ = 505601 is a prime.

It is a d-powerful number, because it can be written as 6 + 3¹¹ + 6² + 6⁷ + 7⁴ + 3¹¹ .

It is not a weakly prime, because it can be changed into another prime (636613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318336 + 318337.

It is an arithmetic number, because the mean of its divisors is an integer number (318337).

2⁶³⁶⁶⁷³ is an apocalyptic number.

It is an amenable number.

636673 is a deficient number, since it is larger than the sum of its proper divisors (1).

636673 is an equidigital number, since it uses as much as digits as its factorization.

636673 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 636673 is about 797.9179155778. The cubic root of 636673 is about 86.0277988373.

The spelling of 636673 in words is "six hundred thirty-six thousand, six hundred seventy-three".