634636463 has 4 divisors (see below), whose sum is σ = 635031528. Its totient is φ = 634241400.

The previous prime is 634636459. The next prime is 634636481. The reversal of 634636463 is 364636436.

It is a happy number.

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 634636463 - 2² = 634636459 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 634636463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634636403) 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, 195113 + ... + 198338.

It is an arithmetic number, because the mean of its divisors is an integer number (158757882).

Almost surely, 2^634636463 is an apocalyptic number.

634636463 is a deficient number, since it is larger than the sum of its proper divisors (395065).

634636463 is a wasteful number, since it uses less digits than its factorization.

634636463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395064.

The product of its digits is 559872, while the sum is 41.

The square root of 634636463 is about 25191.9920411229. The cubic root of 634636463 is about 859.3597465555.

The spelling of 634636463 in words is "six hundred thirty-four million, six hundred thirty-six thousand, four hundred sixty-three".