634812943 has 2 divisors, whose sum is σ = 634812944. Its totient is φ = 634812942.

The previous prime is 634812931. The next prime is 634812979. The reversal of 634812943 is 349218436.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634812943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 634812896 and 634812905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634812043) 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, 317406471 + 317406472.

It is an arithmetic number, because the mean of its divisors is an integer number (317406472).

Almost surely, 2^634812943 is an apocalyptic number.

634812943 is a deficient number, since it is larger than the sum of its proper divisors (1).

634812943 is an equidigital number, since it uses as much as digits as its factorization.

634812943 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 634812943 is about 25195.4944980248. The cubic root of 634812943 is about 859.4393962243.

It can be divided in two parts, 6348 and 12943, that added together give a palindrome (19291).

The spelling of 634812943 in words is "six hundred thirty-four million, eight hundred twelve thousand, nine hundred forty-three".