636371 has 4 divisors (see below), whose sum is σ = 648432. Its totient is φ = 624312.

The previous prime is 636359. The next prime is 636403. The reversal of 636371 is 173636.

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

It is a cyclic number.

It is not a de Polignac number, because 636371 - 2¹⁰ = 635347 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 636371.

It is not an unprimeable number, because it can be changed into a prime (636301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5951 + ... + 6056.

It is an arithmetic number, because the mean of its divisors is an integer number (162108).

2⁶³⁶³⁷¹ is an apocalyptic number.

636371 is a deficient number, since it is larger than the sum of its proper divisors (12061).

636371 is a wasteful number, since it uses less digits than its factorization.

636371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12060.

The product of its digits is 2268, while the sum is 26.

The square root of 636371 is about 797.7286506075. The cubic root of 636371 is about 86.0141945202.

The spelling of 636371 in words is "six hundred thirty-six thousand, three hundred seventy-one".