635442013 has 2 divisors, whose sum is σ = 635442014. Its totient is φ = 635442012.

The previous prime is 635442011. The next prime is 635442037. The reversal of 635442013 is 310244536.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 629106724 + 6335289 = 25082^2 + 2517^2 .

It is a cyclic number.

It is not a de Polignac number, because 635442013 - 2¹ = 635442011 is a prime.

Together with 635442011, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (635442011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317721006 + 317721007.

It is an arithmetic number, because the mean of its divisors is an integer number (317721007).

Almost surely, 2^635442013 is an apocalyptic number.

It is an amenable number.

635442013 is a deficient number, since it is larger than the sum of its proper divisors (1).

635442013 is an equidigital number, since it uses as much as digits as its factorization.

635442013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 635442013 is about 25207.9751864365. The cubic root of 635442013 is about 859.7231906133.

Adding to 635442013 its reverse (310244536), we get a palindrome (945686549).

The spelling of 635442013 in words is "six hundred thirty-five million, four hundred forty-two thousand, thirteen".