636484633 has 2 divisors, whose sum is σ = 636484634. Its totient is φ = 636484632.

The previous prime is 636484621. The next prime is 636484637. The reversal of 636484633 is 336484636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 544382224 + 92102409 = 23332^2 + 9597^2 .

It is a cyclic number.

It is not a de Polignac number, because 636484633 - 2¹³ = 636476441 is a prime.

It is a super-2 number, since 2×636484633² = 810225376090289378, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 636484633.

It is not a weakly prime, because it can be changed into another prime (636484637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318242316 + 318242317.

It is an arithmetic number, because the mean of its divisors is an integer number (318242317).

Almost surely, 2^636484633 is an apocalyptic number.

It is an amenable number.

636484633 is a deficient number, since it is larger than the sum of its proper divisors (1).

636484633 is an equidigital number, since it uses as much as digits as its factorization.

636484633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 43.

The square root of 636484633 is about 25228.6470703445. The cubic root of 636484633 is about 860.1931389724.

The spelling of 636484633 in words is "six hundred thirty-six million, four hundred eighty-four thousand, six hundred thirty-three".