634465213 has 4 divisors (see below), whose sum is σ = 634587100. Its totient is φ = 634343328.

The previous prime is 634465207. The next prime is 634465229. The reversal of 634465213 is 312564436.

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 140825689 + 493639524 = 11867^2 + 22218^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634465213 is a prime.

It is a super-2 number, since 2×634465213² = 805092213014270738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634465243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52770 + ... + 63667.

It is an arithmetic number, because the mean of its divisors is an integer number (158646775).

Almost surely, 2^634465213 is an apocalyptic number.

It is an amenable number.

634465213 is a deficient number, since it is larger than the sum of its proper divisors (121887).

634465213 is a wasteful number, since it uses less digits than its factorization.

634465213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121886.

The product of its digits is 51840, while the sum is 34.

The square root of 634465213 is about 25188.5929142539. The cubic root of 634465213 is about 859.2824431941.

The spelling of 634465213 in words is "six hundred thirty-four million, four hundred sixty-five thousand, two hundred thirteen".