9381131 has 4 divisors (see below), whose sum is σ = 9391200. Its totient is φ = 9371064.

The previous prime is 9381121. The next prime is 9381149. The reversal of 9381131 is 1311839.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1311839 = 17 ⋅77167.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9381131 is a prime.

It is a super-2 number, since 2×9381131² = 176011237678322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9381131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9381121) 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 3 ways as a sum of consecutive naturals, for example, 3476 + ... + 5553.

It is an arithmetic number, because the mean of its divisors is an integer number (2347800).

Almost surely, 2^9381131 is an apocalyptic number.

9381131 is a deficient number, since it is larger than the sum of its proper divisors (10069).

9381131 is a wasteful number, since it uses less digits than its factorization.

9381131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10068.

The product of its digits is 648, while the sum is 26.

The square root of 9381131 is about 3062.8632029524. The cubic root of 9381131 is about 210.9041215150.

The spelling of 9381131 in words is "nine million, three hundred eighty-one thousand, one hundred thirty-one".