9138881 has 8 divisors (see below), whose sum is σ = 9347520. Its totient is φ = 8932752.

The previous prime is 9138863. The next prime is 9138917. The reversal of 9138881 is 1888319.

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 9138881 - 2¹⁴ = 9122497 is a prime.

It is a super-2 number, since 2×9138881² = 167038291864322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9138851) 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 7 ways as a sum of consecutive naturals, for example, 8015 + ... + 9083.

It is an arithmetic number, because the mean of its divisors is an integer number (1168440).

Almost surely, 2^9138881 is an apocalyptic number.

It is an amenable number.

9138881 is a deficient number, since it is larger than the sum of its proper divisors (208639).

9138881 is a wasteful number, since it uses less digits than its factorization.

9138881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255.

The product of its digits is 13824, while the sum is 38.

The square root of 9138881 is about 3023.0582197503. The cubic root of 9138881 is about 209.0728666966.

The spelling of 9138881 in words is "nine million, one hundred thirty-eight thousand, eight hundred eighty-one".