9130981 has 4 divisors (see below), whose sum is σ = 9144172. Its totient is φ = 9117792.

The previous prime is 9130967. The next prime is 9130991. The reversal of 9130981 is 1890319.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8381025 + 749956 = 2895^2 + 866^2 .

It is a cyclic number.

It is not a de Polignac number, because 9130981 - 2¹⁹ = 8606693 is a prime.

It is a super-2 number, since 2×9130981² = 166749628044722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9130991) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5496 + ... + 6961.

It is an arithmetic number, because the mean of its divisors is an integer number (2286043).

Almost surely, 2^9130981 is an apocalyptic number.

It is an amenable number.

9130981 is a deficient number, since it is larger than the sum of its proper divisors (13191).

9130981 is a wasteful number, since it uses less digits than its factorization.

9130981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13190.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 9130981 is about 3021.7513133943. The cubic root of 9130981 is about 209.0126057887.

The spelling of 9130981 in words is "nine million, one hundred thirty thousand, nine hundred eighty-one".