9481981 has 8 divisors (see below), whose sum is σ = 9639000. Its totient is φ = 9326400.

The previous prime is 9481963. The next prime is 9481991. The reversal of 9481981 is 1891849.

It can be written as a sum of positive squares in 4 ways, for example, as 2544025 + 6937956 = 1595^2 + 2634^2 .

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 9481981 - 2¹⁹ = 8957693 is a prime.

It is a super-2 number, since 2×9481981² = 179815927368722, 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 (9481951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26995 + ... + 27343.

It is an arithmetic number, because the mean of its divisors is an integer number (1204875).

Almost surely, 2^9481981 is an apocalyptic number.

It is an amenable number.

9481981 is a deficient number, since it is larger than the sum of its proper divisors (157019).

9481981 is a wasteful number, since it uses less digits than its factorization.

9481981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719.

The product of its digits is 20736, while the sum is 40.

The square root of 9481981 is about 3079.2825463085. The cubic root of 9481981 is about 211.6571904190.

The spelling of 9481981 in words is "nine million, four hundred eighty-one thousand, nine hundred eighty-one".