635434013 has 4 divisors (see below), whose sum is σ = 647423388. Its totient is φ = 623444640.

The previous prime is 635433991. The next prime is 635434027. The reversal of 635434013 is 310434536.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 536987929 + 98446084 = 23173^2 + 9922^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-635434013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (635464013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5994608 + ... + 5994713.

It is an arithmetic number, because the mean of its divisors is an integer number (161855847).

Almost surely, 2^635434013 is an apocalyptic number.

It is an amenable number.

635434013 is a deficient number, since it is larger than the sum of its proper divisors (11989375).

635434013 is a wasteful number, since it uses less digits than its factorization.

635434013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11989374.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 635434013 is about 25207.8165059967. The cubic root of 635434013 is about 859.7195827234.

Adding to 635434013 its reverse (310434536), we get a palindrome (945868549).

The spelling of 635434013 in words is "six hundred thirty-five million, four hundred thirty-four thousand, thirteen".