5238509 has 4 divisors (see below), whose sum is σ = 5514240. Its totient is φ = 4962780.

The previous prime is 5238487. The next prime is 5238523. The reversal of 5238509 is 9058325.

It is a happy number.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5238509 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5238209) 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, 137837 + ... + 137874.

It is an arithmetic number, because the mean of its divisors is an integer number (1378560).

Almost surely, 2^5238509 is an apocalyptic number.

It is an amenable number.

5238509 is a deficient number, since it is larger than the sum of its proper divisors (275731).

5238509 is a wasteful number, since it uses less digits than its factorization.

5238509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275730.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 5238509 is about 2288.7789320946. The cubic root of 5238509 is about 173.6744363726.

The spelling of 5238509 in words is "five million, two hundred thirty-eight thousand, five hundred nine".