726889 has 4 divisors (see below), whose sum is σ = 744660. Its totient is φ = 709120.

The previous prime is 726853. The next prime is 726893. The reversal of 726889 is 988627.

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

It can be written as a sum of positive squares in 2 ways, for example, as 225625 + 501264 = 475^2 + 708^2 .

It is a cyclic number.

It is not a de Polignac number, because 726889 - 2⁹ = 726377 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726809) 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, 8824 + ... + 8905.

It is an arithmetic number, because the mean of its divisors is an integer number (186165).

2⁷²⁶⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

726889 is a deficient number, since it is larger than the sum of its proper divisors (17771).

726889 is a wasteful number, since it uses less digits than its factorization.

726889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17770.

The product of its digits is 48384, while the sum is 40.

The square root of 726889 is about 852.5778556824. The cubic root of 726889 is about 89.9130435833.

It can be divided in two parts, 7 and 26889, that added together give a square (26896 = 164²).

The spelling of 726889 in words is "seven hundred twenty-six thousand, eight hundred eighty-nine".