636433 has 16 divisors (see below), whose sum is σ = 783360. Its totient is φ = 505296.

The previous prime is 636421. The next prime is 636469. The reversal of 636433 is 334636.

636433 = 102² + 103² + ... + 143².

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-636433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 636398 and 636407.

It is not an unprimeable number, because it can be changed into a prime (636403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9466 + ... + 9532.

It is an arithmetic number, because the mean of its divisors is an integer number (48960).

2⁶³⁶⁴³³ is an apocalyptic number.

It is an amenable number.

636433 is a deficient number, since it is larger than the sum of its proper divisors (146927).

636433 is a wasteful number, since it uses less digits than its factorization.

636433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156.

The product of its digits is 3888, while the sum is 25.

The square root of 636433 is about 797.7675099927. The cubic root of 636433 is about 86.0169878105.

It can be divided in two parts, 6364 and 33, that multiplied together give a palindrome (210012).

The spelling of 636433 in words is "six hundred thirty-six thousand, four hundred thirty-three".