636255313 has 2 divisors, whose sum is σ = 636255314. Its totient is φ = 636255312.

The previous prime is 636255281. The next prime is 636255317. The reversal of 636255313 is 313552636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 524043664 + 112211649 = 22892^2 + 10593^2 .

It is a cyclic number.

It is not a de Polignac number, because 636255313 - 2⁵ = 636255281 is a prime.

It is not a weakly prime, because it can be changed into another prime (636255317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318127656 + 318127657.

It is an arithmetic number, because the mean of its divisors is an integer number (318127657).

Almost surely, 2^636255313 is an apocalyptic number.

It is an amenable number.

636255313 is a deficient number, since it is larger than the sum of its proper divisors (1).

636255313 is an equidigital number, since it uses as much as digits as its factorization.

636255313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48600, while the sum is 34.

The square root of 636255313 is about 25224.1018274189. The cubic root of 636255313 is about 860.0898198057.

The spelling of 636255313 in words is "six hundred thirty-six million, two hundred fifty-five thousand, three hundred thirteen".