720577 has 8 divisors (see below), whose sum is σ = 846720. Its totient is φ = 604560.

The previous prime is 720571. The next prime is 720607. The reversal of 720577 is 775027.

It is a happy number.

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

It is not a de Polignac number, because 720577 - 2³ = 720569 is a prime.

It is a Duffinian number.

720577 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (720571) 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, 2377 + ... + 2662.

It is an arithmetic number, because the mean of its divisors is an integer number (105840).

2⁷²⁰⁵⁷⁷ is an apocalyptic number.

It is an amenable number.

720577 is a deficient number, since it is larger than the sum of its proper divisors (126143).

720577 is a wasteful number, since it uses less digits than its factorization.

720577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5063.

The product of its (nonzero) digits is 3430, while the sum is 28.

The square root of 720577 is about 848.8680698436. The cubic root of 720577 is about 89.6520308581.

The spelling of 720577 in words is "seven hundred twenty thousand, five hundred seventy-seven".