2101723 has 16 divisors (see below), whose sum is σ = 2437120. Its totient is φ = 1796256.

The previous prime is 2101721. The next prime is 2101733. The reversal of 2101723 is 3271012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2101723 - 2¹ = 2101721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101697 and 2101706.

It is not an unprimeable number, because it can be changed into a prime (2101721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16486 + ... + 16612.

It is an arithmetic number, because the mean of its divisors is an integer number (152320).

2^2101723 is an apocalyptic number.

2101723 is a deficient number, since it is larger than the sum of its proper divisors (335397).

2101723 is a wasteful number, since it uses less digits than its factorization.

2101723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 2101723 is about 1449.7320442068. The cubic root of 2101723 is about 128.0929297485.

Adding to 2101723 its reverse (3271012), we get a palindrome (5372735).

The spelling of 2101723 in words is "two million, one hundred one thousand, seven hundred twenty-three".