3081993 has 4 divisors (see below), whose sum is σ = 4109328. Its totient is φ = 2054660.

The previous prime is 3081959. The next prime is 3082021. The reversal of 3081993 is 3991803.

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: 3991803 = 3 ⋅1330601.

It is a cyclic number.

It is not a de Polignac number, because 3081993 - 2⁸ = 3081737 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (3081943) 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, 513663 + ... + 513668.

It is an arithmetic number, because the mean of its divisors is an integer number (1027332).

Almost surely, 2^3081993 is an apocalyptic number.

It is an amenable number.

3081993 is a deficient number, since it is larger than the sum of its proper divisors (1027335).

3081993 is a wasteful number, since it uses less digits than its factorization.

3081993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027334.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 3081993 is about 1755.5605942262. The cubic root of 3081993 is about 145.5271025669.

The spelling of 3081993 in words is "three million, eighty-one thousand, nine hundred ninety-three".