723547 has 4 divisors (see below), whose sum is σ = 789336. Its totient is φ = 657760.

The previous prime is 723529. The next prime is 723551. The reversal of 723547 is 745327.

723547 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 745327 = 11 ⋅67757.

It is a cyclic number.

It is not a de Polignac number, because 723547 - 2¹¹ = 721499 is a prime.

It is a super-2 number, since 2×723547² = 1047040522418, which contains 22 as substring.

It is a Duffinian number.

723547 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (723587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32878 + ... + 32899.

It is an arithmetic number, because the mean of its divisors is an integer number (197334).

2⁷²³⁵⁴⁷ is an apocalyptic number.

723547 is a deficient number, since it is larger than the sum of its proper divisors (65789).

723547 is a wasteful number, since it uses less digits than its factorization.

723547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65788.

The product of its digits is 5880, while the sum is 28.

The square root of 723547 is about 850.6156593903. The cubic root of 723547 is about 89.7750348506.

It can be divided in two parts, 72354 and 7, that added together give a square (72361 = 269²).

The spelling of 723547 in words is "seven hundred twenty-three thousand, five hundred forty-seven".