720593 has 4 divisors (see below), whose sum is σ = 732468. Its totient is φ = 708720.

The previous prime is 720571. The next prime is 720607. The reversal of 720593 is 395027.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 124609 + 595984 = 353^2 + 772^2 .

It is a cyclic number.

It is not a de Polignac number, because 720593 - 2¹⁰ = 719569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5846 + ... + 5967.

It is an arithmetic number, because the mean of its divisors is an integer number (183117).

2⁷²⁰⁵⁹³ is an apocalyptic number.

It is an amenable number.

720593 is a deficient number, since it is larger than the sum of its proper divisors (11875).

720593 is a wasteful number, since it uses less digits than its factorization.

720593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11874.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 720593 is about 848.8774941062. The cubic root of 720593 is about 89.6526944105.

The spelling of 720593 in words is "seven hundred twenty thousand, five hundred ninety-three".