634543451 has 4 divisors (see below), whose sum is σ = 651693312. Its totient is φ = 617393592.

The previous prime is 634543417. The next prime is 634543453. The reversal of 634543451 is 154345436.

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 634543451 - 2¹⁴ = 634527067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634543453) 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, 8574875 + ... + 8574948.

It is an arithmetic number, because the mean of its divisors is an integer number (162923328).

Almost surely, 2^634543451 is an apocalyptic number.

634543451 is a deficient number, since it is larger than the sum of its proper divisors (17149861).

634543451 is a wasteful number, since it uses less digits than its factorization.

634543451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17149860.

The product of its digits is 86400, while the sum is 35.

The square root of 634543451 is about 25190.1459106532. The cubic root of 634543451 is about 859.3177620606.

Adding to 634543451 its reverse (154345436), we get a palindrome (788888887).

The spelling of 634543451 in words is "six hundred thirty-four million, five hundred forty-three thousand, four hundred fifty-one".