635849 has 2 divisors, whose sum is σ = 635850. Its totient is φ = 635848.

The previous prime is 635837. The next prime is 635867. The reversal of 635849 is 948536.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 525625 + 110224 = 725^2 + 332^2 .

It is a cyclic number.

It is not a de Polignac number, because 635849 - 2¹² = 631753 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (635809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317924 + 317925.

It is an arithmetic number, because the mean of its divisors is an integer number (317925).

2⁶³⁵⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

635849 is a deficient number, since it is larger than the sum of its proper divisors (1).

635849 is an equidigital number, since it uses as much as digits as its factorization.

635849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The square root of 635849 is about 797.4014045636. The cubic root of 635849 is about 85.9906696205.

The spelling of 635849 in words is "six hundred thirty-five thousand, eight hundred forty-nine".