48509 has 4 divisors (see below), whose sum is σ = 48960. Its totient is φ = 48060.

The previous prime is 48497. The next prime is 48523. The reversal of 48509 is 90584.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-48509 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (48539) 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, 44 + ... + 314.

It is an arithmetic number, because the mean of its divisors is an integer number (12240).

2⁴⁸⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

48509 is a deficient number, since it is larger than the sum of its proper divisors (451).

48509 is a wasteful number, since it uses less digits than its factorization.

48509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 48509 is about 220.2475879550. The cubic root of 48509 is about 36.4704207721.

The spelling of 48509 in words is "forty-eight thousand, five hundred nine".