635959 has 2 divisors, whose sum is σ = 635960. Its totient is φ = 635958.

The previous prime is 635939. The next prime is 635969. The reversal of 635959 is 959536.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 635959 - 2¹⁵ = 603191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (635909) 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, 317979 + 317980.

It is an arithmetic number, because the mean of its divisors is an integer number (317980).

2⁶³⁵⁹⁵⁹ is an apocalyptic number.

635959 is a deficient number, since it is larger than the sum of its proper divisors (1).

635959 is an equidigital number, since it uses as much as digits as its factorization.

635959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36450, while the sum is 37.

The square root of 635959 is about 797.4703756253. The cubic root of 635959 is about 85.9956280453.

The spelling of 635959 in words is "six hundred thirty-five thousand, nine hundred fifty-nine".