634324513 has 4 divisors (see below), whose sum is σ = 634393648. Its totient is φ = 634255380.

The previous prime is 634324501. The next prime is 634324529. The reversal of 634324513 is 315423436.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 634324513 - 2¹³ = 634316321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634324013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18231 + ... + 40012.

It is an arithmetic number, because the mean of its divisors is an integer number (158598412).

Almost surely, 2^634324513 is an apocalyptic number.

It is an amenable number.

634324513 is a deficient number, since it is larger than the sum of its proper divisors (69135).

634324513 is a wasteful number, since it uses less digits than its factorization.

634324513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69134.

The product of its digits is 25920, while the sum is 31.

The square root of 634324513 is about 25185.7998284748. The cubic root of 634324513 is about 859.2189198911.

Adding to 634324513 its reverse (315423436), we get a palindrome (949747949).

The spelling of 634324513 in words is "six hundred thirty-four million, three hundred twenty-four thousand, five hundred thirteen".