723873 has 4 divisors (see below), whose sum is σ = 965168. Its totient is φ = 482580.

The previous prime is 723859. The next prime is 723893. The reversal of 723873 is 378327.

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.

It is not a de Polignac number, because 723873 - 2⁴ = 723857 is a prime.

It is a D-number.

It is a Duffinian number.

723873 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 723873.

It is not an unprimeable number, because it can be changed into a prime (723803) 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, 120643 + ... + 120648.

It is an arithmetic number, because the mean of its divisors is an integer number (241292).

2⁷²³⁸⁷³ is an apocalyptic number.

It is an amenable number.

723873 is a deficient number, since it is larger than the sum of its proper divisors (241295).

723873 is a wasteful number, since it uses less digits than its factorization.

723873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241294.

The product of its digits is 7056, while the sum is 30.

The square root of 723873 is about 850.8072637208. The cubic root of 723873 is about 89.7885157841.

It can be divided in two parts, 72387 and 3, that added together give a triangular number (72390 = T₃₈₀).

The spelling of 723873 in words is "seven hundred twenty-three thousand, eight hundred seventy-three".