9931138 has 16 divisors (see below), whose sum is σ = 17075520. Its totient is φ = 4243536.

The previous prime is 9931123. The next prime is 9931171. The reversal of 9931138 is 8311399.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5020 + ... + 6712.

It is an arithmetic number, because the mean of its divisors is an integer number (1067220).

Almost surely, 2^9931138 is an apocalyptic number.

9931138 is a deficient number, since it is larger than the sum of its proper divisors (7144382).

9931138 is a wasteful number, since it uses less digits than its factorization.

9931138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121.

The product of its digits is 5832, while the sum is 34.

The square root of 9931138 is about 3151.3708128369. The cubic root of 9931138 is about 214.9478005600.

The spelling of 9931138 in words is "nine million, nine hundred thirty-one thousand, one hundred thirty-eight".