726823 has 4 divisors (see below), whose sum is σ = 758448. Its totient is φ = 695200.

The previous prime is 726811. The next prime is 726839. The reversal of 726823 is 328627.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-726823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 726791 and 726800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726853) 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 in 3 ways as a sum of consecutive naturals, for example, 15778 + ... + 15823.

It is an arithmetic number, because the mean of its divisors is an integer number (189612).

2⁷²⁶⁸²³ is an apocalyptic number.

726823 is a deficient number, since it is larger than the sum of its proper divisors (31625).

726823 is a wasteful number, since it uses less digits than its factorization.

726823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31624.

The product of its digits is 4032, while the sum is 28.

The square root of 726823 is about 852.5391486612. The cubic root of 726823 is about 89.9103221956.

The spelling of 726823 in words is "seven hundred twenty-six thousand, eight hundred twenty-three".