636369343 has 4 divisors (see below), whose sum is σ = 637238248. Its totient is φ = 635500440.

The previous prime is 636369319. The next prime is 636369361. The reversal of 636369343 is 343963636.

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 636369343 - 2¹³ = 636361151 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 636369343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636309343) 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, 433353 + ... + 434818.

It is an arithmetic number, because the mean of its divisors is an integer number (159309562).

Almost surely, 2^636369343 is an apocalyptic number.

636369343 is a deficient number, since it is larger than the sum of its proper divisors (868905).

636369343 is an equidigital number, since it uses as much as digits as its factorization.

636369343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868904.

The product of its digits is 629856, while the sum is 43.

The square root of 636369343 is about 25226.3620643168. The cubic root of 636369343 is about 860.1411986477.

The spelling of 636369343 in words is "six hundred thirty-six million, three hundred sixty-nine thousand, three hundred forty-three".