636475 has 12 divisors (see below), whose sum is σ = 902224. Its totient is φ = 436320.

The previous prime is 636473. The next prime is 636499. The reversal of 636475 is 574636.

It is not a de Polignac number, because 636475 - 2¹ = 636473 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (636473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1644 + ... + 1993.

2⁶³⁶⁴⁷⁵ is an apocalyptic number.

636475 is a deficient number, since it is larger than the sum of its proper divisors (265749).

636475 is a wasteful number, since it uses less digits than its factorization.

636475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3654 (or 3649 counting only the distinct ones).

The product of its digits is 15120, while the sum is 31.

The square root of 636475 is about 797.7938330170. The cubic root of 636475 is about 86.0188799364.

It can be divided in two parts, 636 and 475, that added together give a palindrome (1111).

The spelling of 636475 in words is "six hundred thirty-six thousand, four hundred seventy-five".