9138523 has 2 divisors, whose sum is σ = 9138524. Its totient is φ = 9138522.

The previous prime is 9138517. The next prime is 9138527. The reversal of 9138523 is 3258319.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9138523 - 2⁵ = 9138491 is a prime.

It is not a weakly prime, because it can be changed into another prime (9138527) 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 as a sum of consecutive naturals, namely, 4569261 + 4569262.

It is an arithmetic number, because the mean of its divisors is an integer number (4569262).

Almost surely, 2^9138523 is an apocalyptic number.

9138523 is a deficient number, since it is larger than the sum of its proper divisors (1).

9138523 is an equidigital number, since it uses as much as digits as its factorization.

9138523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 31.

The square root of 9138523 is about 3022.9990076082. Note that the first 3 decimals coincide. The cubic root of 9138523 is about 209.0701366372.

The spelling of 9138523 in words is "nine million, one hundred thirty-eight thousand, five hundred twenty-three".