723243 has 6 divisors (see below), whose sum is σ = 966292. Its totient is φ = 481180.

The previous prime is 723227. The next prime is 723257. The reversal of 723243 is 342327.

It is a happy number.

It is not a de Polignac number, because 723243 - 2⁴ = 723227 is a prime.

It is a d-powerful number, because it can be written as 7⁶ + 2³ + 2¹¹ + 3⁸ + 4⁸ + 3¹² .

It is a Duffinian number.

723243 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (723263) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1228 + ... + 1718.

2⁷²³²⁴³ is an apocalyptic number.

723243 is a deficient number, since it is larger than the sum of its proper divisors (243049).

723243 is an frugal number, since it uses more digits than its factorization.

723243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985 (or 494 counting only the distinct ones).

The product of its digits is 1008, while the sum is 21.

The square root of 723243 is about 850.4369465163. The cubic root of 723243 is about 89.7624600242.

It can be divided in two parts, 72324 and 3, that added together give a palindrome (72327).

The spelling of 723243 in words is "seven hundred twenty-three thousand, two hundred forty-three", and thus it is an iban number.