634834219 has 2 divisors, whose sum is σ = 634834220. Its totient is φ = 634834218.

The previous prime is 634834183. The next prime is 634834229. The reversal of 634834219 is 912438436.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 634834219 - 2⁷ = 634834091 is a prime.

It is a super-2 number, since 2×634834219² = 806028971226679922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (634834229) 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 as a sum of consecutive naturals, namely, 317417109 + 317417110.

It is an arithmetic number, because the mean of its divisors is an integer number (317417110).

Almost surely, 2^634834219 is an apocalyptic number.

634834219 is a deficient number, since it is larger than the sum of its proper divisors (1).

634834219 is an equidigital number, since it uses as much as digits as its factorization.

634834219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 40.

The square root of 634834219 is about 25195.9167128327. The cubic root of 634834219 is about 859.4489975977.

The spelling of 634834219 in words is "six hundred thirty-four million, eight hundred thirty-four thousand, two hundred nineteen".