634605943 has 2 divisors, whose sum is σ = 634605944. Its totient is φ = 634605942.

The previous prime is 634605901. The next prime is 634605953. The reversal of 634605943 is 349506436.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 634605943 - 2²¹ = 632508791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 634605896 and 634605905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634605953) 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, 317302971 + 317302972.

It is an arithmetic number, because the mean of its divisors is an integer number (317302972).

Almost surely, 2^634605943 is an apocalyptic number.

634605943 is a deficient number, since it is larger than the sum of its proper divisors (1).

634605943 is an equidigital number, since it uses as much as digits as its factorization.

634605943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 40.

The square root of 634605943 is about 25191.3862857922. The cubic root of 634605943 is about 859.3459706478.

The spelling of 634605943 in words is "six hundred thirty-four million, six hundred five thousand, nine hundred forty-three".