720735543 has 32 divisors (see below), whose sum is σ = 1196325120. Its totient is φ = 424997280.

The previous prime is 720735539. The next prime is 720735559. The reversal of 720735543 is 345537027.

It is not a de Polignac number, because 720735543 - 2² = 720735539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 720735498 and 720735507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720735503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21805 + ... + 43782.

It is an arithmetic number, because the mean of its divisors is an integer number (37385160).

Almost surely, 2^720735543 is an apocalyptic number.

720735543 is a deficient number, since it is larger than the sum of its proper divisors (475589577).

720735543 is a wasteful number, since it uses less digits than its factorization.

720735543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65644 (or 65638 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 36.

The square root of 720735543 is about 26846.5182658757. The cubic root of 720735543 is about 896.5860552423.

The spelling of 720735543 in words is "seven hundred twenty million, seven hundred thirty-five thousand, five hundred forty-three".