636354413 has 2 divisors, whose sum is σ = 636354414. Its totient is φ = 636354412.

The previous prime is 636354343. The next prime is 636354419. The reversal of 636354413 is 314453636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 631165129 + 5189284 = 25123^2 + 2278^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-636354413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (636354419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318177206 + 318177207.

It is an arithmetic number, because the mean of its divisors is an integer number (318177207).

Almost surely, 2^636354413 is an apocalyptic number.

It is an amenable number.

636354413 is a deficient number, since it is larger than the sum of its proper divisors (1).

636354413 is an equidigital number, since it uses as much as digits as its factorization.

636354413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 35.

The square root of 636354413 is about 25226.0661419889. The cubic root of 636354413 is about 860.1344719417.

The spelling of 636354413 in words is "six hundred thirty-six million, three hundred fifty-four thousand, four hundred thirteen".