1723723 has 2 divisors, whose sum is σ = 1723724. Its totient is φ = 1723722.

The previous prime is 1723721. The next prime is 1723727. The reversal of 1723723 is 3273271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1723723 - 2¹ = 1723721 is a prime.

Together with 1723721, it forms a pair of twin primes.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1723721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 861861 + 861862.

It is an arithmetic number, because the mean of its divisors is an integer number (861862).

2^1723723 is an apocalyptic number.

1723723 is a deficient number, since it is larger than the sum of its proper divisors (1).

1723723 is an equidigital number, since it uses as much as digits as its factorization.

1723723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1764, while the sum is 25.

The square root of 1723723 is about 1312.9063180593. The cubic root of 1723723 is about 119.9009135752.

Adding to 1723723 its reverse (3273271), we get a palindrome (4996994).

The spelling of 1723723 in words is "one million, seven hundred twenty-three thousand, seven hundred twenty-three".