943981 has 8 divisors (see below), whose sum is σ = 1001984. Its totient is φ = 887760.

The previous prime is 943967. The next prime is 944003. The reversal of 943981 is 189349.

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 943981 - 2¹¹ = 941933 is a prime.

It is a super-2 number, since 2×943981² = 1782200256722, 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 (943931) 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 7 ways as a sum of consecutive naturals, for example, 736 + ... + 1558.

It is an arithmetic number, because the mean of its divisors is an integer number (125248).

2⁹⁴³⁹⁸¹ is an apocalyptic number.

It is an amenable number.

943981 is a deficient number, since it is larger than the sum of its proper divisors (58003).

943981 is a wasteful number, since it uses less digits than its factorization.

943981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891.

The product of its digits is 7776, while the sum is 34.

The square root of 943981 is about 971.5868463498. The cubic root of 943981 is about 98.0967044870.

The spelling of 943981 in words is "nine hundred forty-three thousand, nine hundred eighty-one".