2185723 has 2 divisors, whose sum is σ = 2185724. Its totient is φ = 2185722.

The previous prime is 2185709. The next prime is 2185727. The reversal of 2185723 is 3275812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2185723 - 2¹³ = 2177531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2185691 and 2185700.

It is not a weakly prime, because it can be changed into another prime (2185727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1092861 + 1092862.

It is an arithmetic number, because the mean of its divisors is an integer number (1092862).

2^2185723 is an apocalyptic number.

2185723 is a deficient number, since it is larger than the sum of its proper divisors (1).

2185723 is an equidigital number, since it uses as much as digits as its factorization.

2185723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 28.

The square root of 2185723 is about 1478.4190880802. The cubic root of 2185723 is about 129.7771923114. Note that the first 3 decimals are identical.

The spelling of 2185723 in words is "two million, one hundred eighty-five thousand, seven hundred twenty-three".