1801723 has 8 divisors (see below), whose sum is σ = 2246400. Its totient is φ = 1403880.

The previous prime is 1801717. The next prime is 1801727. The reversal of 1801723 is 3271081.

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 1801723 - 2⁵ = 1801691 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1801694 and 1801703.

It is not an unprimeable number, because it can be changed into a prime (1801727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11623 + ... + 11776.

It is an arithmetic number, because the mean of its divisors is an integer number (280800).

2^1801723 is an apocalyptic number.

1801723 is a deficient number, since it is larger than the sum of its proper divisors (444677).

1801723 is a wasteful number, since it uses less digits than its factorization.

1801723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23417.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1801723 is about 1342.2827570970. The cubic root of 1801723 is about 121.6828409931.

The spelling of 1801723 in words is "one million, eight hundred one thousand, seven hundred twenty-three".