634213 has 4 divisors (see below), whose sum is σ = 637600. Its totient is φ = 630828.

The previous prime is 634211. The next prime is 634223. The reversal of 634213 is 312436.

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 634213 - 2¹ = 634211 is a prime.

It is a super-2 number, since 2×634213² = 804452258738, which contains 22 as substring.

It is a Duffinian number.

634213 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1395 + ... + 1792.

It is an arithmetic number, because the mean of its divisors is an integer number (159400).

2⁶³⁴²¹³ is an apocalyptic number.

It is an amenable number.

634213 is a deficient number, since it is larger than the sum of its proper divisors (3387).

634213 is a wasteful number, since it uses less digits than its factorization.

634213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3386.

The product of its digits is 432, while the sum is 19.

The square root of 634213 is about 796.3749117093. The cubic root of 634213 is about 85.9168567276.

Adding to 634213 its reverse (312436), we get a palindrome (946649).

The spelling of 634213 in words is "six hundred thirty-four thousand, two hundred thirteen".