634543 has 16 divisors (see below), whose sum is σ = 824320. Its totient is φ = 474336.

The previous prime is 634541. The next prime is 634567. The reversal of 634543 is 345436.

It is a cyclic number.

It is not a de Polignac number, because 634543 - 2¹ = 634541 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1546 + ... + 1912.

It is an arithmetic number, because the mean of its divisors is an integer number (51520).

2⁶³⁴⁵⁴³ is an apocalyptic number.

634543 is a deficient number, since it is larger than the sum of its proper divisors (189777).

634543 is a wasteful number, since it uses less digits than its factorization.

634543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406.

The product of its digits is 4320, while the sum is 25.

The square root of 634543 is about 796.5820736120. The cubic root of 634543 is about 85.9317558475.

Adding to 634543 its reverse (345436), we get a palindrome (979979).

The spelling of 634543 in words is "six hundred thirty-four thousand, five hundred forty-three".