638153 has 4 divisors (see below), whose sum is σ = 671760. Its totient is φ = 604548.

The previous prime is 638147. The next prime is 638159. The reversal of 638153 is 351836.

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 (638147) and next prime (638159).

It is a cyclic number.

It is not a de Polignac number, because 638153 - 2¹⁰ = 637129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (638159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16775 + ... + 16812.

It is an arithmetic number, because the mean of its divisors is an integer number (167940).

2⁶³⁸¹⁵³ is an apocalyptic number.

It is an amenable number.

638153 is a deficient number, since it is larger than the sum of its proper divisors (33607).

638153 is a wasteful number, since it uses less digits than its factorization.

638153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33606.

The product of its digits is 2160, while the sum is 26.

The square root of 638153 is about 798.8447909325. The cubic root of 638153 is about 86.0944068728.

Adding to 638153 its reverse (351836), we get a palindrome (989989).

The spelling of 638153 in words is "six hundred thirty-eight thousand, one hundred fifty-three".