723653 has 8 divisors (see below), whose sum is σ = 870720. Its totient is φ = 587520.

The previous prime is 723623. The next prime is 723661. The reversal of 723653 is 356327.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 723653 - 2⁶ = 723589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 723653.

It is not an unprimeable number, because it can be changed into a prime (723623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2588 + ... + 2853.

It is an arithmetic number, because the mean of its divisors is an integer number (108840).

2⁷²³⁶⁵³ is an apocalyptic number.

It is an amenable number.

723653 is a deficient number, since it is larger than the sum of its proper divisors (147067).

723653 is a wasteful number, since it uses less digits than its factorization.

723653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5467.

The product of its digits is 3780, while the sum is 26.

The square root of 723653 is about 850.6779649197. The cubic root of 723653 is about 89.7794186658.

The spelling of 723653 in words is "seven hundred twenty-three thousand, six hundred fifty-three".