636049 has 4 divisors (see below), whose sum is σ = 644836. Its totient is φ = 627264.

The previous prime is 636043. The next prime is 636059. The reversal of 636049 is 940636.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 518400 + 117649 = 720^2 + 343^2 .

It is a cyclic number.

It is not a de Polignac number, because 636049 - 2⁵ = 636017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4284 + ... + 4429.

It is an arithmetic number, because the mean of its divisors is an integer number (161209).

2⁶³⁶⁰⁴⁹ is an apocalyptic number.

It is an amenable number.

636049 is a deficient number, since it is larger than the sum of its proper divisors (8787).

636049 is an equidigital number, since it uses as much as digits as its factorization.

636049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8786.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 636049 is about 797.5268020575. The cubic root of 636049 is about 85.9996845130. Note that the first 3 decimals are identical.

The spelling of 636049 in words is "six hundred thirty-six thousand, forty-nine".