635642113 has 2 divisors, whose sum is σ = 635642114. Its totient is φ = 635642112.

The previous prime is 635642083. The next prime is 635642123. The reversal of 635642113 is 311246536.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 469025649 + 166616464 = 21657^2 + 12908^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-635642113 is a prime.

It is not a weakly prime, because it can be changed into another prime (635642123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317821056 + 317821057.

It is an arithmetic number, because the mean of its divisors is an integer number (317821057).

Almost surely, 2^635642113 is an apocalyptic number.

It is an amenable number.

635642113 is a deficient number, since it is larger than the sum of its proper divisors (1).

635642113 is an equidigital number, since it uses as much as digits as its factorization.

635642113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 31.

The square root of 635642113 is about 25211.9438560378. The cubic root of 635642113 is about 859.8134231090.

Adding to 635642113 its reverse (311246536), we get a palindrome (946888649).

The spelling of 635642113 in words is "six hundred thirty-five million, six hundred forty-two thousand, one hundred thirteen".