9173981 has 8 divisors (see below), whose sum is σ = 9373824. Its totient is φ = 8976240.

The previous prime is 9173959. The next prime is 9174001. The reversal of 9173981 is 1893719.

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 9173981 - 2⁶ = 9173917 is a prime.

It is a super-2 number, since 2×9173981² = 168323854776722, 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 (9173951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10736 + ... + 11558.

It is an arithmetic number, because the mean of its divisors is an integer number (1171728).

Almost surely, 2^9173981 is an apocalyptic number.

It is an amenable number.

9173981 is a deficient number, since it is larger than the sum of its proper divisors (199843).

9173981 is a wasteful number, since it uses less digits than its factorization.

9173981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051.

The product of its digits is 13608, while the sum is 38.

The square root of 9173981 is about 3028.8580356299. The cubic root of 9173981 is about 209.3401890890.

The spelling of 9173981 in words is "nine million, one hundred seventy-three thousand, nine hundred eighty-one".