2101933 has 4 divisors (see below), whose sum is σ = 2158780. Its totient is φ = 2045088.

The previous prime is 2101909. The next prime is 2101961. The reversal of 2101933 is 3391012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 751689 + 1350244 = 867^2 + 1162^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101933 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2101933.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 28368 + ... + 28441.

It is an arithmetic number, because the mean of its divisors is an integer number (539695).

2^2101933 is an apocalyptic number.

It is an amenable number.

2101933 is a deficient number, since it is larger than the sum of its proper divisors (56847).

2101933 is an equidigital number, since it uses as much as digits as its factorization.

2101933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56846.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 2101933 is about 1449.8044695751. The cubic root of 2101933 is about 128.0971958704.

Adding to 2101933 its reverse (3391012), we get a palindrome (5492945).

The spelling of 2101933 in words is "two million, one hundred one thousand, nine hundred thirty-three".