9138530 has 8 divisors (see below), whose sum is σ = 16449372. Its totient is φ = 3655408.

The previous prime is 9138527. The next prime is 9138533. The reversal of 9138530 is 358319.

It is a Cunningham number, because it is equal to 3023²+1.

It is an interprime number because it is at equal distance from previous prime (9138527) and next prime (9138533).

It can be written as a sum of positive squares in 2 ways, for example, as 9138529 + 1 = 3023^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 9138493 and 9138502.

It is not an unprimeable number, because it can be changed into a prime (9138533) 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, 456917 + ... + 456936.

Almost surely, 2^9138530 is an apocalyptic number.

9138530 is a deficient number, since it is larger than the sum of its proper divisors (7310842).

9138530 is a wasteful number, since it uses less digits than its factorization.

9138530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913860.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 9138530 is about 3023.0001653986. Note that the first 3 decimals coincide. The cubic root of 9138530 is about 209.0701900189.

The spelling of 9138530 in words is "nine million, one hundred thirty-eight thousand, five hundred thirty".