636020101 has 2 divisors, whose sum is σ = 636020102. Its totient is φ = 636020100.

The previous prime is 636020051. The next prime is 636020107. The reversal of 636020101 is 101020636.

636020101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 472845025 + 163175076 = 21745^2 + 12774^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-636020101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (636020107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318010050 + 318010051.

It is an arithmetic number, because the mean of its divisors is an integer number (318010051).

Almost surely, 2^636020101 is an apocalyptic number.

It is an amenable number.

636020101 is a deficient number, since it is larger than the sum of its proper divisors (1).

636020101 is an equidigital number, since it uses as much as digits as its factorization.

636020101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 636020101 is about 25219.4389509362. The cubic root of 636020101 is about 859.9838202292.

Adding to 636020101 its reverse (101020636), we get a palindrome (737040737).

The spelling of 636020101 in words is "six hundred thirty-six million, twenty thousand, one hundred one".