723449 has 4 divisors (see below), whose sum is σ = 726864. Its totient is φ = 720036.

The previous prime is 723439. The next prime is 723451. The reversal of 723449 is 944327.

723449 is nontrivially palindromic in base 15.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 944327 = 29 ⋅32563.

It is a cyclic number.

It is not a de Polignac number, because 723449 - 2⁸ = 723193 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (723409) 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, 1367 + ... + 1820.

It is an arithmetic number, because the mean of its divisors is an integer number (181716).

2⁷²³⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

723449 is a deficient number, since it is larger than the sum of its proper divisors (3415).

723449 is a wasteful number, since it uses less digits than its factorization.

723449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3414.

The product of its digits is 6048, while the sum is 29.

The square root of 723449 is about 850.5580521046. The cubic root of 723449 is about 89.7709815084.

The spelling of 723449 in words is "seven hundred twenty-three thousand, four hundred forty-nine".