635320253 has 2 divisors, whose sum is σ = 635320254. Its totient is φ = 635320252.

The previous prime is 635320249. The next prime is 635320267. The reversal of 635320253 is 352023536.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 551451289 + 83868964 = 23483^2 + 9158^2 .

It is a cyclic number.

It is not a de Polignac number, because 635320253 - 2² = 635320249 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (635320223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317660126 + 317660127.

It is an arithmetic number, because the mean of its divisors is an integer number (317660127).

Almost surely, 2^635320253 is an apocalyptic number.

It is an amenable number.

635320253 is a deficient number, since it is larger than the sum of its proper divisors (1).

635320253 is an equidigital number, since it uses as much as digits as its factorization.

635320253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 29.

The square root of 635320253 is about 25205.5599620401. The cubic root of 635320253 is about 859.6682752524.

Adding to 635320253 its reverse (352023536), we get a palindrome (987343789).

The spelling of 635320253 in words is "six hundred thirty-five million, three hundred twenty thousand, two hundred fifty-three".