634805741 has 2 divisors, whose sum is σ = 634805742. Its totient is φ = 634805740.

The previous prime is 634805723. The next prime is 634805777. The reversal of 634805741 is 147508436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 616777225 + 18028516 = 24835^2 + 4246^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634805741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 634805695 and 634805704.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634805701) 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, 317402870 + 317402871.

It is an arithmetic number, because the mean of its divisors is an integer number (317402871).

Almost surely, 2^634805741 is an apocalyptic number.

It is an amenable number.

634805741 is a deficient number, since it is larger than the sum of its proper divisors (1).

634805741 is an equidigital number, since it uses as much as digits as its factorization.

634805741 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 634805741 is about 25195.3515752410. The cubic root of 634805741 is about 859.4361460775.

The spelling of 634805741 in words is "six hundred thirty-four million, eight hundred five thousand, seven hundred forty-one".