726999 has 16 divisors (see below), whose sum is σ = 1193472. Its totient is φ = 383328.

The previous prime is 726991. The next prime is 727003. The reversal of 726999 is 999627.

It is not a de Polignac number, because 726999 - 2³ = 726991 is a prime.

It is an Ulam number.

726999 is a modest number, since divided by 999 gives 726 as remainder.

726999 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 726999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1059 + ... + 1604.

It is an arithmetic number, because the mean of its divisors is an integer number (74592).

2⁷²⁶⁹⁹⁹ is an apocalyptic number.

726999 is a deficient number, since it is larger than the sum of its proper divisors (466473).

726999 is a wasteful number, since it uses less digits than its factorization.

726999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2686.

The product of its digits is 61236, while the sum is 42.

The square root of 726999 is about 852.6423634796. The cubic root of 726999 is about 89.9175788635.

The spelling of 726999 in words is "seven hundred twenty-six thousand, nine hundred ninety-nine".