723745 has 8 divisors (see below), whose sum is σ = 947520. Its totient is φ = 526320.

The previous prime is 723739. The next prime is 723761. The reversal of 723745 is 547327.

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

It is not a de Polignac number, because 723745 - 2⁷ = 723617 is a prime.

723745 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6525 + ... + 6634.

It is an arithmetic number, because the mean of its divisors is an integer number (118440).

2⁷²³⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

723745 is a deficient number, since it is larger than the sum of its proper divisors (223775).

723745 is a wasteful number, since it uses less digits than its factorization.

723745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13175.

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

The square root of 723745 is about 850.7320377181. The cubic root of 723745 is about 89.7832231395.

The spelling of 723745 in words is "seven hundred twenty-three thousand, seven hundred forty-five".