634642203 has 16 divisors (see below), whose sum is σ = 932476160. Its totient is φ = 381465504.

The previous prime is 634642201. The next prime is 634642223. The reversal of 634642203 is 302246436.

It is a happy number.

It is not a de Polignac number, because 634642203 - 2¹ = 634642201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634642201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187543 + ... + 190896.

It is an arithmetic number, because the mean of its divisors is an integer number (58279760).

Almost surely, 2^634642203 is an apocalyptic number.

634642203 is a deficient number, since it is larger than the sum of its proper divisors (297833957).

634642203 is a wasteful number, since it uses less digits than its factorization.

634642203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378498.

The product of its (nonzero) digits is 20736, while the sum is 30.

The square root of 634642203 is about 25192.1059659569. The cubic root of 634642203 is about 859.3623373879.

Adding to 634642203 its reverse (302246436), we get a palindrome (936888639).

The spelling of 634642203 in words is "six hundred thirty-four million, six hundred forty-two thousand, two hundred three".