635879 has 2 divisors, whose sum is σ = 635880. Its totient is φ = 635878.

The previous prime is 635867. The next prime is 635891. The reversal of 635879 is 978536.

It is a balanced prime because it is at equal distance from previous prime (635867) and next prime (635891).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-635879 is a prime.

It is a Chen 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 (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317939 + 317940.

It is an arithmetic number, because the mean of its divisors is an integer number (317940).

2⁶³⁵⁸⁷⁹ is an apocalyptic number.

635879 is a deficient number, since it is larger than the sum of its proper divisors (1).

635879 is an equidigital number, since it uses as much as digits as its factorization.

635879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 38.

The square root of 635879 is about 797.4202154448. The cubic root of 635879 is about 85.9920219749.

The spelling of 635879 in words is "six hundred thirty-five thousand, eight hundred seventy-nine".