638276603 has 4 divisors (see below), whose sum is σ = 655527360. Its totient is φ = 621025848.

The previous prime is 638276599. The next prime is 638276687. The reversal of 638276603 is 306672836.

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 638276603 - 2² = 638276599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (638276693) 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, 8625323 + ... + 8625396.

It is an arithmetic number, because the mean of its divisors is an integer number (163881840).

Almost surely, 2^638276603 is an apocalyptic number.

638276603 is a deficient number, since it is larger than the sum of its proper divisors (17250757).

638276603 is a wasteful number, since it uses less digits than its factorization.

638276603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17250756.

The product of its (nonzero) digits is 217728, while the sum is 41.

The square root of 638276603 is about 25264.1366961153. The cubic root of 638276603 is about 860.9996501739. Note that the first 3 decimals are identical.

The spelling of 638276603 in words is "six hundred thirty-eight million, two hundred seventy-six thousand, six hundred three".