2081993 has 4 divisors (see below), whose sum is σ = 2084880. Its totient is φ = 2079108.

The previous prime is 2081969. The next prime is 2082019. The reversal of 2081993 is 3991802.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2081993 - 2¹⁸ = 1819849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2081903) 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, 698 + ... + 2156.

It is an arithmetic number, because the mean of its divisors is an integer number (521220).

2^2081993 is an apocalyptic number.

It is an amenable number.

2081993 is a deficient number, since it is larger than the sum of its proper divisors (2887).

2081993 is a wasteful number, since it uses less digits than its factorization.

2081993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2886.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 2081993 is about 1442.9112931847. The cubic root of 2081993 is about 127.6908432543.

The spelling of 2081993 in words is "two million, eighty-one thousand, nine hundred ninety-three".