723945 has 24 divisors (see below), whose sum is σ = 1237824. Its totient is φ = 361216.

The previous prime is 723923. The next prime is 723949. The reversal of 723945 is 549327.

723945 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 723945 - 2⁵ = 723913 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

723945 is strictly pandigital in base 7.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 723945.

It is not an unprimeable number, because it can be changed into a prime (723949) 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 23 ways as a sum of consecutive naturals, for example, 4252 + ... + 4418.

It is an arithmetic number, because the mean of its divisors is an integer number (51576).

2⁷²³⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

723945 is a deficient number, since it is larger than the sum of its proper divisors (513879).

723945 is a wasteful number, since it uses less digits than its factorization.

723945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 192 counting only the distinct ones).

The product of its digits is 7560, while the sum is 30.

The square root of 723945 is about 850.8495754245. The cubic root of 723945 is about 89.7914926225.

The spelling of 723945 in words is "seven hundred twenty-three thousand, nine hundred forty-five".