634605901 has 2 divisors, whose sum is σ = 634605902. Its totient is φ = 634605900.

The previous prime is 634605899. The next prime is 634605943. The reversal of 634605901 is 109506436.

634605901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 616330276 + 18275625 = 24826^2 + 4275^2 .

It is a cyclic number.

It is not a de Polignac number, because 634605901 - 2¹ = 634605899 is a prime.

Together with 634605899, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634635901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317302950 + 317302951.

It is an arithmetic number, because the mean of its divisors is an integer number (317302951).

Almost surely, 2^634605901 is an apocalyptic number.

It is an amenable number.

634605901 is a deficient number, since it is larger than the sum of its proper divisors (1).

634605901 is an equidigital number, since it uses as much as digits as its factorization.

634605901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 634605901 is about 25191.3854521739. The cubic root of 634605901 is about 859.3459516899.

The spelling of 634605901 in words is "six hundred thirty-four million, six hundred five thousand, nine hundred one".