406723 has 4 divisors (see below), whose sum is σ = 409248. Its totient is φ = 404200.

The previous prime is 406717. The next prime is 406729. The reversal of 406723 is 327604.

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

It is an interprime number because it is at equal distance from previous prime (406717) and next prime (406729).

It is a cyclic number.

It is not a de Polignac number, because 406723 - 2¹⁷ = 275651 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 406694 and 406703.

It is not an unprimeable number, because it can be changed into a prime (406729) 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, 1003 + ... + 1348.

It is an arithmetic number, because the mean of its divisors is an integer number (102312).

2⁴⁰⁶⁷²³ is an apocalyptic number.

406723 is a deficient number, since it is larger than the sum of its proper divisors (2525).

406723 is a wasteful number, since it uses less digits than its factorization.

406723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2524.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 406723 is about 637.7483829850. The cubic root of 406723 is about 74.0911343699.

The spelling of 406723 in words is "four hundred six thousand, seven hundred twenty-three".