726169 has 2 divisors, whose sum is σ = 726170. Its totient is φ = 726168.

The previous prime is 726163. The next prime is 726181. The reversal of 726169 is 961627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 700569 + 25600 = 837^2 + 160^2 .

It is an emirp because it is prime and its reverse (961627) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 726169 - 2⁵ = 726137 is a prime.

It is a super-2 number, since 2×726169² = 1054642833122, which contains 22 as substring.

It is a Chen prime.

726169 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 726169.

It is not a weakly prime, because it can be changed into another prime (726163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363084 + 363085.

It is an arithmetic number, because the mean of its divisors is an integer number (363085).

2⁷²⁶¹⁶⁹ is an apocalyptic number.

It is an amenable number.

726169 is a deficient number, since it is larger than the sum of its proper divisors (1).

726169 is an equidigital number, since it uses as much as digits as its factorization.

726169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 31.

The square root of 726169 is about 852.1555022412. The cubic root of 726169 is about 89.8833468081.

It can be divided in two parts, 72 and 6169, that added together give a square (6241 = 79²).

The spelling of 726169 in words is "seven hundred twenty-six thousand, one hundred sixty-nine".