638049 has 4 divisors (see below), whose sum is σ = 850736. Its totient is φ = 425364.

The previous prime is 638047. The next prime is 638051. The reversal of 638049 is 940836.

638049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (638047) and next prime (638051).

It is not a de Polignac number, because 638049 - 2¹ = 638047 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (638047) 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, 106339 + ... + 106344.

It is an arithmetic number, because the mean of its divisors is an integer number (212684).

2⁶³⁸⁰⁴⁹ is an apocalyptic number.

It is an amenable number.

638049 is a deficient number, since it is larger than the sum of its proper divisors (212687).

638049 is a wasteful number, since it uses less digits than its factorization.

638049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212686.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 638049 is about 798.7796942837. The cubic root of 638049 is about 86.0897296743.

The spelling of 638049 in words is "six hundred thirty-eight thousand, forty-nine".