636632349 has 4 divisors (see below), whose sum is σ = 848843136. Its totient is φ = 424421564.

The previous prime is 636632317. The next prime is 636632351. The reversal of 636632349 is 943236636.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 636632349 - 2⁵ = 636632317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 636632349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636632149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106105389 + ... + 106105394.

It is an arithmetic number, because the mean of its divisors is an integer number (212210784).

Almost surely, 2^636632349 is an apocalyptic number.

It is an amenable number.

636632349 is a deficient number, since it is larger than the sum of its proper divisors (212210787).

636632349 is a wasteful number, since it uses less digits than its factorization.

636632349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212210786.

The product of its digits is 419904, while the sum is 42.

The square root of 636632349 is about 25231.5744455236. The cubic root of 636632349 is about 860.2596786575.

The spelling of 636632349 in words is "six hundred thirty-six million, six hundred thirty-two thousand, three hundred forty-nine".