636674 has 4 divisors (see below), whose sum is σ = 955014. Its totient is φ = 318336.

The previous prime is 636673. The next prime is 636697. The reversal of 636674 is 476636.

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

It can be written as a sum of positive squares in only one way, i.e., 616225 + 20449 = 785^2 + 143^2 .

It is a d-powerful number, because it can be written as 6⁵ + 3¹² + 6⁶ + 6⁶ + 7² + 4⁶ .

It is a self number, because there is not a number n which added to its sum of digits gives 636674.

It is not an unprimeable number, because it can be changed into a prime (636673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159167 + ... + 159170.

2⁶³⁶⁶⁷⁴ is an apocalyptic number.

636674 is a deficient number, since it is larger than the sum of its proper divisors (318340).

636674 is a wasteful number, since it uses less digits than its factorization.

636674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318339.

The product of its digits is 18144, while the sum is 32.

The square root of 636674 is about 797.9185422084. The cubic root of 636674 is about 86.0278438776.

The spelling of 636674 in words is "six hundred thirty-six thousand, six hundred seventy-four".