636349 has 4 divisors (see below), whose sum is σ = 727264. Its totient is φ = 545436.

The previous prime is 636343. The next prime is 636353. The reversal of 636349 is 943636.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 636349 - 2⁹ = 635837 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 636349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636343) 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 in 3 ways as a sum of consecutive naturals, for example, 45447 + ... + 45460.

It is an arithmetic number, because the mean of its divisors is an integer number (181816).

2⁶³⁶³⁴⁹ is an apocalyptic number.

It is an amenable number.

636349 is a deficient number, since it is larger than the sum of its proper divisors (90915).

636349 is an equidigital number, since it uses as much as digits as its factorization.

636349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90914.

The product of its digits is 11664, while the sum is 31.

The square root of 636349 is about 797.7148613383. The cubic root of 636349 is about 86.0132033091.

The spelling of 636349 in words is "six hundred thirty-six thousand, three hundred forty-nine".