720893 has 4 divisors (see below), whose sum is σ = 726528. Its totient is φ = 715260.

The previous prime is 720887. The next prime is 720899. The reversal of 720893 is 398027.

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 an interprime number because it is at equal distance from previous prime (720887) and next prime (720899).

It is not a de Polignac number, because 720893 - 2⁴ = 720877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2621 + ... + 2882.

It is an arithmetic number, because the mean of its divisors is an integer number (181632).

2⁷²⁰⁸⁹³ is an apocalyptic number.

It is an amenable number.

720893 is a deficient number, since it is larger than the sum of its proper divisors (5635).

720893 is a wasteful number, since it uses less digits than its factorization.

720893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5634.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 720893 is about 849.0541796611. The cubic root of 720893 is about 89.6651342005.

The spelling of 720893 in words is "seven hundred twenty thousand, eight hundred ninety-three".