993081 has 4 divisors (see below), whose sum is σ = 1324112. Its totient is φ = 662052.

The previous prime is 993079. The next prime is 993103. The reversal of 993081 is 180399.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 180399 = 3 ⋅60133.

It is not a de Polignac number, because 993081 - 2¹ = 993079 is a prime.

It is a super-2 number, since 2×993081² = 1972419745122, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (993001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165511 + ... + 165516.

It is an arithmetic number, because the mean of its divisors is an integer number (331028).

2⁹⁹³⁰⁸¹ is an apocalyptic number.

It is an amenable number.

993081 is a deficient number, since it is larger than the sum of its proper divisors (331031).

993081 is a wasteful number, since it uses less digits than its factorization.

993081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331030.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 993081 is about 996.5344951380. The cubic root of 993081 is about 99.7688326952.

It can be divided in two parts, 9930 and 81, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 993081 in words is "nine hundred ninety-three thousand, eighty-one".