9138239 has 8 divisors (see below), whose sum is σ = 10021968. Its totient is φ = 8263360.

The previous prime is 9138229. The next prime is 9138247. The reversal of 9138239 is 9328319.

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-9138239 is a prime.

It is a super-2 number, since 2×9138239² = 167014824042242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9138199 and 9138208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9138209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59 + ... + 4275.

It is an arithmetic number, because the mean of its divisors is an integer number (1252746).

Almost surely, 2^9138239 is an apocalyptic number.

9138239 is a deficient number, since it is larger than the sum of its proper divisors (883729).

9138239 is a wasteful number, since it uses less digits than its factorization.

9138239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4425.

The product of its digits is 11664, while the sum is 35.

The square root of 9138239 is about 3022.9520340224. The cubic root of 9138239 is about 209.0679708411.

The spelling of 9138239 in words is "nine million, one hundred thirty-eight thousand, two hundred thirty-nine".