636485 has 4 divisors (see below), whose sum is σ = 763788. Its totient is φ = 509184.

The previous prime is 636473. The next prime is 636499. The reversal of 636485 is 584636.

636485 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 407044 + 229441 = 638^2 + 479^2 .

It is a cyclic number.

It is not a de Polignac number, because 636485 - 2⁴ = 636469 is a prime.

It is a super-2 number, since 2×636485² = 810226310450, which contains 22 as substring.

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 636485.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63644 + ... + 63653.

It is an arithmetic number, because the mean of its divisors is an integer number (190947).

2⁶³⁶⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

636485 is a deficient number, since it is larger than the sum of its proper divisors (127303).

636485 is a wasteful number, since it uses less digits than its factorization.

636485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127302.

The product of its digits is 17280, while the sum is 32.

The square root of 636485 is about 797.8001002758. The cubic root of 636485 is about 86.0193304303.

The spelling of 636485 in words is "six hundred thirty-six thousand, four hundred eighty-five".