636047 has 4 divisors (see below), whose sum is σ = 646536. Its totient is φ = 625560.

The previous prime is 636043. The next prime is 636059. The reversal of 636047 is 740636.

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

It is a cyclic number.

It is not a de Polignac number, because 636047 - 2² = 636043 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 636047.

It is not an unprimeable number, because it can be changed into a prime (636043) 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 in 3 ways as a sum of consecutive naturals, for example, 5153 + ... + 5274.

It is an arithmetic number, because the mean of its divisors is an integer number (161634).

2⁶³⁶⁰⁴⁷ is an apocalyptic number.

636047 is a deficient number, since it is larger than the sum of its proper divisors (10489).

636047 is a wasteful number, since it uses less digits than its factorization.

636047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10488.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 636047 is about 797.5255481801. The cubic root of 636047 is about 85.9995943734. Note that the first 3 decimals are identical.

The spelling of 636047 in words is "six hundred thirty-six thousand, forty-seven".