2101993 has 8 divisors (see below), whose sum is σ = 2232000. Its totient is φ = 1975248.

The previous prime is 2101961. The next prime is 2102021. The reversal of 2101993 is 3991012.

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 2101993 - 2⁵ = 2101961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 583 + ... + 2131.

It is an arithmetic number, because the mean of its divisors is an integer number (279000).

2^2101993 is an apocalyptic number.

2101993 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2101993 is a deficient number, since it is larger than the sum of its proper divisors (130007).

2101993 is a wasteful number, since it uses less digits than its factorization.

2101993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 2101993 is about 1449.8251618730. The cubic root of 2101993 is about 128.0984147101.

It can be divided in two parts, 21019 and 93, that added together give a palindrome (21112).

The spelling of 2101993 in words is "two million, one hundred one thousand, nine hundred ninety-three".