638047099 has 8 divisors (see below), whose sum is σ = 644763888. Its totient is φ = 631344480.

The previous prime is 638047093. The next prime is 638047103. The reversal of 638047099 is 990740836.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-638047099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (638047093) 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 7 ways as a sum of consecutive naturals, for example, 103689 + ... + 109669.

It is an arithmetic number, because the mean of its divisors is an integer number (80595486).

Almost surely, 2^638047099 is an apocalyptic number.

638047099 is a deficient number, since it is larger than the sum of its proper divisors (6716789).

638047099 is a wasteful number, since it uses less digits than its factorization.

638047099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7085.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 638047099 is about 25259.5941970571. The cubic root of 638047099 is about 860.8964417574.

The spelling of 638047099 in words is "six hundred thirty-eight million, forty-seven thousand, ninety-nine".