634042847 has 2 divisors, whose sum is σ = 634042848. Its totient is φ = 634042846.

The previous prime is 634042813. The next prime is 634042859. The reversal of 634042847 is 748240436.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 634042847 - 2¹⁰ = 634041823 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 634042847.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634042867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317021423 + 317021424.

It is an arithmetic number, because the mean of its divisors is an integer number (317021424).

Almost surely, 2^634042847 is an apocalyptic number.

634042847 is a deficient number, since it is larger than the sum of its proper divisors (1).

634042847 is an equidigital number, since it uses as much as digits as its factorization.

634042847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 38.

The square root of 634042847 is about 25180.2074455315. The cubic root of 634042847 is about 859.0917249609.

The spelling of 634042847 in words is "six hundred thirty-four million, forty-two thousand, eight hundred forty-seven".