9993081 has 32 divisors (see below), whose sum is σ = 16070400. Its totient is φ = 5402880.

The previous prime is 9993079. The next prime is 9993083. The reversal of 9993081 is 1803999.

It is an interprime number because it is at equal distance from previous prime (9993079) and next prime (9993083).

It is not a de Polignac number, because 9993081 - 2¹ = 9993079 is a prime.

It is a super-2 number, since 2×9993081² = 199723335745122, which contains 22 as substring.

9993081 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9993083) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37015 + ... + 37283.

It is an arithmetic number, because the mean of its divisors is an integer number (502200).

Almost surely, 2^9993081 is an apocalyptic number.

It is an amenable number.

9993081 is a deficient number, since it is larger than the sum of its proper divisors (6077319).

9993081 is a wasteful number, since it uses less digits than its factorization.

9993081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 9993081 is about 3161.1834809134. The cubic root of 9993081 is about 215.3937690936.

The spelling of 9993081 in words is "nine million, nine hundred ninety-three thousand, eighty-one".