635343673 has 2 divisors, whose sum is σ = 635343674. Its totient is φ = 635343672.

The previous prime is 635343661. The next prime is 635343707. The reversal of 635343673 is 376343536.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 346071609 + 289272064 = 18603^2 + 17008^2 .

It is a cyclic number.

It is not a de Polignac number, because 635343673 - 2⁹ = 635343161 is a prime.

It is a super-2 number, since 2×635343673² = 807323165642261858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (635343073) 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, 317671836 + 317671837.

It is an arithmetic number, because the mean of its divisors is an integer number (317671837).

Almost surely, 2^635343673 is an apocalyptic number.

It is an amenable number.

635343673 is a deficient number, since it is larger than the sum of its proper divisors (1).

635343673 is an equidigital number, since it uses as much as digits as its factorization.

635343673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 40.

The square root of 635343673 is about 25206.0245377965. The cubic root of 635343673 is about 859.6788385252.

The spelling of 635343673 in words is "six hundred thirty-five million, three hundred forty-three thousand, six hundred seventy-three".