635321013 has 4 divisors (see below), whose sum is σ = 847094688. Its totient is φ = 423547340.

The previous prime is 635320981. The next prime is 635321021. The reversal of 635321013 is 310123536.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 635321013 - 2⁵ = 635320981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (635321023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105886833 + ... + 105886838.

It is an arithmetic number, because the mean of its divisors is an integer number (211773672).

Almost surely, 2^635321013 is an apocalyptic number.

It is an amenable number.

635321013 is a deficient number, since it is larger than the sum of its proper divisors (211773675).

635321013 is a wasteful number, since it uses less digits than its factorization.

635321013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211773674.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 635321013 is about 25205.5750380744. The cubic root of 635321013 is about 859.6686180441.

Adding to 635321013 its reverse (310123536), we get a palindrome (945444549).

The spelling of 635321013 in words is "six hundred thirty-five million, three hundred twenty-one thousand, thirteen".