638323603 has 4 divisors (see below), whose sum is σ = 638374320. Its totient is φ = 638272888.

The previous prime is 638323597. The next prime is 638323613. The reversal of 638323603 is 306323836.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 638323603 - 2²⁹ = 101452691 is a prime.

It is a super-3 number, since 3×638323603³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (638323613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9426 + ... + 36952.

It is an arithmetic number, because the mean of its divisors is an integer number (159593580).

Almost surely, 2^638323603 is an apocalyptic number.

638323603 is a deficient number, since it is larger than the sum of its proper divisors (50717).

638323603 is a wasteful number, since it uses less digits than its factorization.

638323603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50716.

The product of its (nonzero) digits is 46656, while the sum is 34.

The square root of 638323603 is about 25265.0668512870. The cubic root of 638323603 is about 861.0207831175.

The spelling of 638323603 in words is "six hundred thirty-eight million, three hundred twenty-three thousand, six hundred three".