9138506 has 24 divisors (see below), whose sum is σ = 15635520. Its totient is φ = 3992976.

The previous prime is 9138491. The next prime is 9138511. The reversal of 9138506 is 6058319.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 5711 + ... + 7133.

It is an arithmetic number, because the mean of its divisors is an integer number (651480).

Almost surely, 2^9138506 is an apocalyptic number.

9138506 is a deficient number, since it is larger than the sum of its proper divisors (6497014).

9138506 is a wasteful number, since it uses less digits than its factorization.

9138506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1470 (or 1457 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 9138506 is about 3022.9961958296. The cubic root of 9138506 is about 209.0700069957.

The spelling of 9138506 in words is "nine million, one hundred thirty-eight thousand, five hundred six".