726859 has 4 divisors (see below), whose sum is σ = 830704. Its totient is φ = 623016.

The previous prime is 726853. The next prime is 726893. The reversal of 726859 is 958627.

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

It is a cyclic number.

It is not a de Polignac number, because 726859 - 2¹⁵ = 694091 is a prime.

It is a super-3 number, since 3×726859³ = 1152051175771973337, which contains 333 as substring.

It is a d-powerful number, because it can be written as 7² + 2¹⁶ + 8⁶ + 6⁵ + 5⁸ + 9³ .

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, 51912 + ... + 51925.

It is an arithmetic number, because the mean of its divisors is an integer number (207676).

2⁷²⁶⁸⁵⁹ is an apocalyptic number.

726859 is a deficient number, since it is larger than the sum of its proper divisors (103845).

726859 is a wasteful number, since it uses less digits than its factorization.

726859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103844.

The product of its digits is 30240, while the sum is 37.

The square root of 726859 is about 852.5602617997. The cubic root of 726859 is about 89.9118066093.

The spelling of 726859 in words is "seven hundred twenty-six thousand, eight hundred fifty-nine".