636934 has 4 divisors (see below), whose sum is σ = 955404. Its totient is φ = 318466.

The previous prime is 636931. The next prime is 636947. The reversal of 636934 is 439636.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 636896 and 636905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159232 + ... + 159235.

It is an arithmetic number, because the mean of its divisors is an integer number (238851).

2⁶³⁶⁹³⁴ is an apocalyptic number.

636934 is a deficient number, since it is larger than the sum of its proper divisors (318470).

636934 is a wasteful number, since it uses less digits than its factorization.

636934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318469.

The product of its digits is 11664, while the sum is 31.

The square root of 636934 is about 798.0814494774. The cubic root of 636934 is about 86.0395527455.

The spelling of 636934 in words is "six hundred thirty-six thousand, nine hundred thirty-four".