9138905 has 8 divisors (see below), whose sum is σ = 11544000. Its totient is φ = 6926256.

The previous prime is 9138863. The next prime is 9138917. The reversal of 9138905 is 5098319.

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

It is a cyclic number.

It is not a de Polignac number, because 9138905 - 2¹² = 9134809 is a prime.

It is an unprimeable number.

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, 48005 + ... + 48194.

It is an arithmetic number, because the mean of its divisors is an integer number (1443000).

Almost surely, 2^9138905 is an apocalyptic number.

9138905 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

9138905 is a deficient number, since it is larger than the sum of its proper divisors (2405095).

9138905 is a wasteful number, since it uses less digits than its factorization.

9138905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96223.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 9138905 is about 3023.0621892379. The cubic root of 9138905 is about 209.0730497148.

The spelling of 9138905 in words is "nine million, one hundred thirty-eight thousand, nine hundred five".