724279 has 4 divisors (see below), whose sum is σ = 728784. Its totient is φ = 719776.

The previous prime is 724277. The next prime is 724291. The reversal of 724279 is 972427.

It is a happy number.

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 724279 - 2¹ = 724277 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 724279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724277) 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, 2002 + ... + 2335.

It is an arithmetic number, because the mean of its divisors is an integer number (182196).

2⁷²⁴²⁷⁹ is an apocalyptic number.

724279 is a deficient number, since it is larger than the sum of its proper divisors (4505).

724279 is a wasteful number, since it uses less digits than its factorization.

724279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4504.

The product of its digits is 7056, while the sum is 31.

The square root of 724279 is about 851.0458272032. The cubic root of 724279 is about 89.8052992642.

The spelling of 724279 in words is "seven hundred twenty-four thousand, two hundred seventy-nine".