720873 has 8 divisors (see below), whose sum is σ = 1068000. Its totient is φ = 480564.

The previous prime is 720869. The next prime is 720877. The reversal of 720873 is 378027.

It is an interprime number because it is at equal distance from previous prime (720869) and next prime (720877).

It is not a de Polignac number, because 720873 - 2² = 720869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 26699 = 720873 / (7 + 2 + 0 + 8 + 7 + 3).

It is not an unprimeable number, because it can be changed into a prime (720877) 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, 13323 + ... + 13376.

It is an arithmetic number, because the mean of its divisors is an integer number (133500).

2⁷²⁰⁸⁷³ is an apocalyptic number.

It is an amenable number.

720873 is a deficient number, since it is larger than the sum of its proper divisors (347127).

720873 is a wasteful number, since it uses less digits than its factorization.

720873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26708 (or 26702 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 720873 is about 849.0424017680. The cubic root of 720873 is about 89.6643049886.

The spelling of 720873 in words is "seven hundred twenty thousand, eight hundred seventy-three".