635371673 has 2 divisors, whose sum is σ = 635371674. Its totient is φ = 635371672.

The previous prime is 635371603. The next prime is 635371697. The reversal of 635371673 is 376173536.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 409981504 + 225390169 = 20248^2 + 15013^2 .

It is a cyclic number.

It is not a de Polignac number, because 635371673 - 2⁸ = 635371417 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 635371673.

It is not a weakly prime, because it can be changed into another prime (635371603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317685836 + 317685837.

It is an arithmetic number, because the mean of its divisors is an integer number (317685837).

Almost surely, 2^635371673 is an apocalyptic number.

It is an amenable number.

635371673 is a deficient number, since it is larger than the sum of its proper divisors (1).

635371673 is an equidigital number, since it uses as much as digits as its factorization.

635371673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 238140, while the sum is 41.

The square root of 635371673 is about 25206.5799544484. The cubic root of 635371673 is about 859.6914672042.

The spelling of 635371673 in words is "six hundred thirty-five million, three hundred seventy-one thousand, six hundred seventy-three".